掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1088/1742-6596/1220/1/012043

その他URL： https://iopscience.iop.org/article/10.1088/1742-6596/1220/1/012043

掲載種別：研究論文（研究会，シンポジウム資料等）  

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.74.1.0_1578

CiNii Article

掲載種別：研究論文（研究会，シンポジウム資料等）  

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.74.1.0_3184

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.74.2.0_2769

CiNii Article

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.73.2.0_1044

CiNii Article

掲載種別：研究論文（国際会議プロシーディングス）  

掲載種別：研究論文（研究会，シンポジウム資料等）   共著区分：共著  

掲載種別：研究論文（学術雑誌）  

<p>前回の物理学会において，β-カロテンの四光波混合信号をスペクトル領域で観測を行った結果，吸収端の低エネルギー側のスペクトルがT&lt;100fsの領域で大きく変化することを報告した．今回は特に，過渡回折（tau=0），およびフォトエコー（tau>0）のパルス配置において，パルスのチャープが信号に及ぼす影響について実験結果とモデル計算の両面から議論する．</p>

DOI： 10.11316/jpsgaiyo.72.1.0_1553

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.72.2.0_2846

CiNii Article

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1021/acs.jpcb.6b00121

掲載種別：研究論文（学術雑誌）  

Photosynthetic light-harvesting apparatus efficiently capture sunlight and transfer the energy to reaction centers, while they safely dissipate excess energy to surrounding environments for a protection of their organisms. In this study, we performed pump-probe spectroscopic measurements with a temporal window ranging from femtosecond to submillisecond on the purple bacterial antenna complex LH2 from Rhodobacter sphaeroides 2.4.1 to clarify its photoprotection functions. The observed excited state dynamics in the time range from subnanosecond to microsecond exhibits that the triplet-triplet excitation energy transfer from bacteriochlorophyll a to carotenoid takes place with a time constant of 16.7 ns. Furthermore, ultrafast spectroscopic data suggests that a molecular assembly of bacteriochlorophyll a in LH2 efficiently suppresses a generation of triple bacteriochlorophyll a.

DOI： 10.1021/acs.jpcb.6b00121

掲載種別：研究論文（学術雑誌）  

<p>β-カロテンの四光波混合信号をスペクトル領域で観測を行った結果，吸収端の低エネルギー側のスペクトルがT<100fsの領域で大きく変化することを見出した．過渡回折（tau=0），およびフォトエコー（tau>0）のパルス配置において，パルス形状が信号に及ぼす影響を考慮に入れ，観測結果について議論する予定である．</p>

DOI： 10.11316/jpsgaiyo.71.2.0_1370

CiNii Article

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.jphotochem.2015.06.025

掲載種別：研究論文（学術雑誌）  

Vibrational dynamics of the photosynthetic pigment chlorophyll a in solution have been investigated by degenerated three-pulse four-wave mixing spectroscopies (transient grating and photon echo) using 20 fs pulses. Real-time wave-packet motions of intramolecular vibrations were clearly observed in four-wave mixing signals. Twelve vibrational modes due to chlorophyll a in the region of energy ranging from 200 to 1400 cm(-1) were found in the Fourier transform power spectra of coherent oscillations. We demonstrate that a specific light-matter interaction can be enhanced by a control of the temporal separation between the first and second pulses. (C) 2015 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jphotochem.2015.06.025

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1007/s11120-015-0095-z

掲載種別：研究論文（学術雑誌）  

Absorption and Raman spectra of spheroidene dissolved in various organic solvents and bound to peripheral light-harvesting LH2 complexes from photosynthetic purple bacteria Rhodobacter (Rba.) sphaeroides 2.4.1 were measured. The results showed that the peak energies of absorption and C-C and C=C stretching Raman lines are linearly proportional to the polarizability of solvents, as has already been reported. When comparing these results with those measured on LH2 complexes, it was confirmed that spheroidene is surrounded by a media with high polarizability. However, the change in the spectral width of the Raman lines, which reflect vibrational decay time, cannot be explained simply by a similar dependence of solvent polarizability. The experimental results were analyzed using a potential theoretical model. Consequently, a systematic change in the Raman line widths in the ground state can be satisfactorily explained as a function of the viscosity of the surrounding media. Even when the absorption peaks appear at the same energy, the vibrational decay time of spheroidene in the LH2 complexes is approximately 15-20 % slower than that in organic solvents.

DOI： 10.1007/s11120-015-0095-z

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.bbabio.2014.09.001

掲載種別：研究論文（学術雑誌）  

This review discusses the application of time-resolved vibrational spectroscopies to the studies of carotenoids in photosynthesis. The focus is on the ultrafast time regime and the study of photophysics and photochemistry of carotenoids by femtosecond time-resolved stimulated Raman and four-wave mixing spectroscopies. This article is part of a Special Issue entitled: Vibrational spectroscopies and bioenergetic systems. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.bbabio.2014.09.001

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.70.1.0_1601

CiNii Article

掲載種別：研究論文（国際会議プロシーディングス）  

Ultrafast Intramolecular Charge Transfer (ICT) state dynamics of fucoxanthin have been investigated by femtosecond pump-probe measurements. A modification of conjugated polyene chain length of fucoxanthin enabled us to clarify and control an ICT character.

DOI： 10.1007/978-3-319-13242-6_141

その他URL： http://orcid.org/0000-0001-9339-7913

掲載種別：研究論文（国際会議プロシーディングス）  

Ultrafast energy transfer dynamics in photosynthetic antennas were investigated by femtosecond pump-probe measurements. Photo-excited carotenoids with short-polyene chains efficiently transfer energy to bacteriochlorophylls, while the energy rapidly dissipates to carotenoids in antennas containing longer carotenoids.

DOI： 10.1007/978-3-319-13242-6_140

その他URL： http://orcid.org/0000-0001-9339-7913

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1007/s11120-014-9995-6

掲載種別：研究論文（学術雑誌）  

Fucoxanthin, containing a carbonyl group in conjugation with its polyene backbone, is a naturally occurring pigment in marine organisms and is essential to the photosynthetic light-harvesting function in brown alga and diatom. Fucoxanthin exhibits optical characteristics attributed to an intramolecular charge transfer (ICT) state that arises in polar environments due to the presence of the carbonyl group. In this study, we report the spectroscopic properties of fucoxanthin in methanol (polar and protic solvent) observed by femtosecond pump-probe measurements in the near-infrared region, where transient absorption associated with the optically allowed S-2 (1(1)B (u) (+) ) state and stimulated emission from the strongly coupled S-1/ICT state were observed following one-photon excitation to the S-2 state. The results showed that the amplitude of the stimulated emission of the S-1/ICT state increased with decreasing excitation energy, demonstrating that the fucoxanthin form associated with the lower energy of the steady-state absorption exhibits stronger ICT character.

DOI： 10.1007/s11120-014-9995-6

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.cplett.2014.04.022

掲載種別：研究論文（学術雑誌）  

Ultrafast excited state dynamics of the short fucoxanthin homolog with four conjugated double bonds and its allene-modified analog in various solvents have been studied by femtosecond pump-probe spectroscopy. The results clarified that the short fucoxanthin homolog exhibits a strong intramolecular charge transfer character in an excited manifold even in a nonpolar solvent. Then, the data show that a modification of the allene-group induced the lifetime shortening of the lowest singlet state of the short fucoxanthin homolog. This implies that the allene-group enhances the ICT character of the short fucoxanthin homolog. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.cplett.2014.04.022

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1021/jz5000287

掲載種別：研究論文（学術雑誌）  

Fucoxanthin is an essential pigment for the highly efficient light-harvesting function of marine algal photosynthesis. It exhibits excited state properties attributed to intramolecular charge transfer (ICT) in polar environments due to the presence of the carbonyl group in its polyene backbone. This report describes the excited state properties of fucoxanthin homologues with four to eight conjugated double bonds in various solvents using the femtosecond pump-probe technique. The results clarified that fucoxanthin homologues with longer polyene chains did not possess pronounced ICT spectroscopic signatures, while the shorter fucoxanthin homologues had a strong ICT character, even in a nonpolar solvent. On the basis of the observations, we quantitatively correlated the ICT character in the excited state to the conjugated polyene chain lengths of fucoxanthin molecules.

DOI： 10.1021/jz5000287

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.69.1.4.0_768_3

CiNii Article

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1063/1.4813526

掲載種別：研究論文（学術雑誌）  

Ultrafast excited-state dynamics of the photosynthetic pigment (Mg-)bacteriochlorophyll a and its Zn-substituted form were investigated by steady-state absorption/fluorescence and femtosecond pump-probe spectroscopic measurements. The obtained steady-state absorption and fluorescence spectra of bacteriochlorophyll a in solution showed that the central metal compound significantly affects the energy of the Q(x) state, but has almost no effect on the Q(y) state. Photo-induced absorption spectra were recorded upon excitation of Mg- and Zn-bacteriochlorophyll a into either their Q(x) or Q(y) state. By comparing the kinetic traces of transient absorption, ground-state beaching, and stimulated emission after excitation to the Q(x) or Q(y) state, we showed that the Q(x) state was substantially incorporated in the ultrafast excited-state dynamics of bacteriochlorophyll a. Based on these observations, the lifetime of the Q(x) state was determined to be 50 and 70 fs for Mg- and Zn-bacteriochlorophyll a, respectively, indicating that the lifetime was influenced by the central metal atom due to the change of the energy gap between the Q(x) and Q(y) states. (C) 2013 AIP Publishing LLC.

DOI： 10.1063/1.4813526

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1021/jz300612c

掲載種別：研究論文（学術雑誌）  

Fucoxanthin-chlorophyll-a/c protein (FCP) complexes from brown algae Cladosiphon okamuranus TOKIDA (Okinawa Mozuku in Japanese) contain the only species of carbonyl carotenoid, fucoxanthin, which exhibits spectral characteristics attributed to an intramolecular charge-transfer (ICT) property that arises in polar environments due to the presence of the carbonyl group in its polyene backbone. Here, we investigated the role of the ICT property of fucoxanthin in ultrafast energy transfer to chlorophyll-a/c in brown algal photosynthesis using femtosecond pump-probe spectroscopic measurements. The observed excited-state dynamics show that the ICT character of fucoxanthin in FCP extends its absorption band to longer wavelengths and enhances its electronic interaction with chlorophyll-a molecules, leading to efficient energy transfer from fucoxanthin to chlorophyll-a.

DOI： 10.1021/jz300612c

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1063/1.4737129

掲載種別：研究論文（学術雑誌）  

Ultrafast excited state dynamics of spirilloxanthin in solution and bound to the light-harvesting core antenna complexes from Rhodospirillum rubrum Si were investigated by means of femtosecond pump-probe spectroscopic measurements. The previously proposed S* state of spirilloxanthin was clearly observed both in solution and bound to the light-harvesting core antenna complexes, while the lowest triplet excited state appeared only with spirilloxanthin bound to the protein complexes. Ultrafast formation of triplet spirilloxanthin bound to the protein complexes was observed upon excitation of either spirilloxanthin or bacteriochlorophyll-a. The anomalous reaction of the ultrafast triplet formation is discussed in terms of ultrafast energy transfer between spirilloxanthin and bacteriochlorophyll-a. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4737129]

DOI： 10.1063/1.4737129

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.85.245408

掲載種別：研究論文（学術雑誌）  

Coherent vibronic oscillations in the ground state of carotenoids have been investigated by means of three-pulse four-wave mixing spectroscopy. Here, we especially focused our attention on the influence of the temporal separation between the first and the second pulses, i.e., the coherent period tau, on the third- order nonlinear signals. The vibronic oscillations of the fundamental modes are clearly observed when tau is set to zero. They appear via an impulsive resonant Raman process and reflect the spectral feature of a conventional Raman spectrum very well. Interestingly, in addition to the coherent vibronic oscillations of the fundamental modes, we found that high-intensity coherent vibronic oscillations of the overtones and the coupled modes appear when a nonzero value of tau is employed. These coupled modes become dominant at a rather large coherent period of tau similar to 60 fs. A simple extension of our previous calculations that assume electronic harmonic potentials and vibronic Brownian oscillators cannot explain the present experimental results. Instead, we propose a model that takes into consideration the mixing between singlet states and the higher-order interaction of molecular vibrations with electronic states, which is in quantitative agreement with the experimental results. Our finding opens the way to controlling even Raman inactive vibronic oscillations using light.

DOI： 10.1103/PhysRevB.85.245408

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.jlumin.2010.09.018

掲載種別：研究論文（学術雑誌）  

Ultrafast relaxation kinetics of fucoxanthin in polar and non-polar solvents have been studied by femtosecond pump-probe spectroscopy. Transient absorption associated with SI or intramolecular charge transfer (ICT) excited state has been observed following either one-photon excitation to the optically allowed S-2 state or two-photon excitation to the symmetry-forbidden Si state. The results suggest that the ICT state formed after excitation of fucoxanthin in a polar solvent is a distinct excited state from S-1. (C) 2010 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jlumin.2010.09.018

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/pssb.201000687

掲載種別：研究論文（学術雑誌）  

Ultrafast excited state dynamics of cartenoids in solution and bound to pigment protein complexes have been investigated by femtosecond pump-spectroscopic measurements. Possible excitation energy transfer (EET) pathways between carotenoids and bacteriochlorophylls and their efficiency dependc strongly on the conjugation length of carotenoids. In the case of Rhodobacter sphaeroides 2.4 dual EEt channels from carotenoid to bacteriochlorophyll (S-2 -&gt; Q(x), S-1 -&gt; Q(y))upon excitation of carotenoid were observed. In the case of Rhodospirillumribrum S1, on the other hand, the EET pathway of S-1 -&gt; Q(y) upon excitation of carotenoid was closed, whereas reverse energy transfer from bacteriochlorophyll to carotenoid was clearly observed upon excitation of bacteriochlorophy. The role of carotenoids in the light-harvesting complexes is discussed in terms of their conjugation length. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssb.201000687

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/pssc.201000679

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/pssc.201000684

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1039/c0cp02568b

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/ange.201003771

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.phpro.2011.02.018

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.66.2.4.0_732_1

CiNii Article

掲載種別：研究論文（国際会議プロシーディングス）  

Ultrafast excited state dynamics of carotenoids in solution and bound to pigment-protein complexes have been investigated by means of femtosecond pump-probe spectroscopic measurements. Ultrafast triplet formation of carotenoids bound to pigment-protein complexes was observed upon excitation of both carotenoids and bacteriochlorophyll. The anomalous reaction of triplet formation of carotenoids bound to pigment-protein complexes is discussed in terms of ultrafast triplet-triplet excitation energy transfer between carotenoid and bacteriochlorophyll. (C) 2011 Published by Elsevier B. V.

DOI： 10.1016/j.phpro.2011.02.014

その他URL： http://orcid.org/0000-0001-9339-7913

掲載種別：研究論文（国際会議プロシーディングス）  

Ultrafast excited state dynamics of the photosynthetic pigment bacteriochlorophyll a in solution have been investigated by means of steady-state and time-resolved spectroscopic techniques. Photo-induced absorption spectra were observed upon excitation of bacteriochlorophyll a into its Q(y) or Q(x) absorption band. We show an incorporation of the Q(x) state in the ultrafast excited state dynamics of Bchl a in solution based on a comparison of transient absorption, beaching, and stimulated emission kinetics after excitation to the Q(x) or Q(y) band. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201000684

掲載種別：研究論文（学術雑誌）  

Carotenoids containing a carbonyl group in conjugation with their polyene backbone are naturally-occurring pigments in marine organisms and are essential to the photosynthetic light-harvesting function in aquatic algae. These carotenoids exhibit spectral characteristics attributed to an intramolecular charge transfer (ICT) state that arise in polar solvents due to the presence of the carbonyl group. Here, we report the spectroscopic properties of the carbonyl carotenoid fucoxanthin in polar (methanol) and nonpolar (cyclohexane) solvents studied by steady-state absorption and femtosecond pump-probe measurements. Transient absorption associated with the optically forbidden S-1 (2(1)A(g)(-)) state and/or the ICT state were observed following one-photon excitation to the optically allowed S-2 (1(1)B(u)(+)) state in methanol. The transient absorption measurements carried out in methanol showed that the ratio of the ICT-to-S-1 state formation increased with decreasing excitation energy. We also showed that the ICT character was clearly visible in the steady-state absorption in methanol based on a Franck-Condon analysis. The results suggest that two spectroscopic forms of fucoxanthin, blue and red, exist in the polar environment.

DOI： 10.1039/c0cp02568b

掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/anie.201003771

掲載種別：研究論文（国際会議プロシーディングス）  

その他URL： http://orcid.org/0000-0001-9339-7913

掲載種別：研究論文（国際会議プロシーディングス）  

The four-wave mixing signals from spheroidene have been systematically investigated at various coherent periods tau. The pronounced vibronic oscillations of the fundamental modes in the ground state are clearly observed in the transient grating configuration (tau = 0). Interestingly, it was found that the overtones and coupled modes become very strong compared to the fundamental modes when the signal is measured in the virtual photon-echo configuration (tau &lt; 0). The experimental results have been analyzed using a Brownian oscillator model. The intensity change with respect to the coherent period is qualitatively reproduced by the calculations. We discuss a plausible model that allows a quantitative agreement between experiment and calculation. (C) 2011 Published by Elsevier B.V.

DOI： 10.1016/j.phpro.2011.02.018

掲載種別：研究論文（国際会議プロシーディングス）  

The photophysics of the regioregular (RR) poly(3-alkylthiophene) (P3AT) films is investigated by cw-photoinduced absorption (PIA) measurements based on bleaching signals. The photoexcitation intensity dependence of the cw-PIA signals demonstrates that both photogenerated localized and delocalized polarons obey a bimolecular recombination process under cw photoexcitation. It is demonstrated that the lineshape of cw-PIA bleaching spectra for the P3AT films varies with the length of the alkyl substituents of P3AT. The bleaching spectra reveal a trend that the electron-phonon couplings of final exciton migration sites become strong with increasing the interlamella distance in the P3AT film. This indicates that interlamella couplings affect the electron-phonon couplings of the migration sites locating at two-dimensional lamellas. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201000681

掲載種別：研究論文（国際会議プロシーディングス）  

The nonlinear optical responses of carotenoids can be investigated by means of the four-wave mixing (FWM) spectroscopy. Here we especially focus on the relationship among the pulse sequences, temporal separations between the pulses and the resulting coherent signals. In the transient grating configuration, coherent oscillations with a period of a few tens femtoseconds are clearly observed, which reflect nuclear motions in the ground state. Interestingly, it was found that the Raman inactive modes can be excited by properly controlling the temporal separation of the first and second excitation pulses. The amplitudes of these oscillations are more than three orders of magnitude stronger in comparison with the predicted values obtained by well-established quantum mechanical calculations. We propose a model to explain our finding that takes the state mixing between S-2 and S-x and the higher-order interaction of the electron-phonon coupling into consideration.
[GRAPHICS]
Pulse configuration for the FWM measurements. Our novel methods enable overtones and coupled modes of the coherent vibronic oscillations to be excited on demand. (c) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.201000679

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.66.1.4.0_751_2

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.1143/JJAP.49.119201

掲載種別：研究論文（学術雑誌）  

DOI： 10.1143/JJAP.49.119201

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.81.245112

掲載種別：研究論文（学術雑誌）  

The concurrent dynamics of the electronic excitation and vibronic oscillations of spheroidene have been investigated by means of the transient grating (TG) spectroscopy. The third-order optical responses of spheroidene in an organic solvent, in the LH2 light-harvesting antenna complexes, and in chromatophores have been compared in order to investigate the influence of the environment surrounding this photosynthetic pigment. Vibronic coherent oscillations with a period of several tens of femtosecond have been clearly observed superimposed on a slowly varying background, which reflects the electronic dynamics. The dynamics of the coherent oscillations have been analyzed by means of the wavelet analysis. Within our experimental accuracy, the decay times of the C=C and C-C stretching modes and C-CH(3) rocking mode of each specimen are very close. The experimental results have also been analyzed using a Brownian oscillator model. For these numerical calculations, the spectral density for the underdamped modes has been determined from the Raman spectrum of spheroidene. It was found that the low-frequency modes that reflect the influence of the protein environment can be approximated by the overdamped Brownian oscillator. The experimentally observed linear absorption spectra as well as the third-order optical responses, i.e., TG curves, are reproduced very well by these calculations. The close agreement between the experiments and calculations indicates that the Feynman-diagrammatic approach can be applied to express not only the internal conversion but also the intermolecular excitation energy-transfer processes. The vibronic decay rates of spheroidene in LH2 complexes and chromatophores are evaluated to be about 20% larger than in the organic solvent.

DOI： 10.1103/PhysRevB.81.245112

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.65.1.4.0_805_1

CiNii Article

掲載種別：研究論文（国際会議プロシーディングス）  

The ultrafast excited state dynamics of fucoxanthin in a polar solvent have been investigated by femtosecond one- and two-photon pump-probe spectroscopic measurements. Transient absorption spectra and their kinetics depend strongly on excitation energy. © OSA / UP 2010.

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.jlumin.2009.04.045

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.jlumin.2009.04.098

掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jlumin.2009.01.027

掲載種別：研究論文（学術雑誌）  

We investigate how structural distortions in carotenoid cause decoherences of its high-frequency vibrational modes by applying the sub-20-fs time-resolved transient grating spectroscopy to beta-catotene and lycopene. The results indicate that the C = C central stretching mode shows significant loss of coherence under the effects of the steric hindrance between beta-ionone ring and polyene backbone, whereas the other high-frequency modes do not show such dependency on the structural distortions. (C) 2000 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jlumin.2009.04.098

掲載種別：研究論文（学術雑誌）  

The vibronic coherence of photosynthetic pigment-protein complexes has been investigated by means of transient grating spectroscopy using sub 20 fs optical pulses. In the present work, we focus our attention on the LH2 antenna complexes from Rhodobacter sphaeroides 2.4.1 because the information about their Structure investigated by the electron and atomic force microscopy is available and the electric levels of pigments are well resolved, resulting in clear absorption spectrum. The vibronic coherent oscillations with a period of a few tens of femtoseconds have been clearly observed We found that the temporal change of the coherent oscillations reflects the vibrational relaxation in the ground state. Calculations based on the Brownian oscillator model were performed Under the impulsive excitation limit. The spectral density has been determined from the Raman measurement of spheroidene. Good agreement between the calculation and the experimental results has been achieved in the linear absorption spectrum and transient grating signal, which strongly Supports the validity of our model. (C) 2009 Elsevier B.V. All rights reserved

DOI： 10.1016/j.jlumin.2009.01.027

掲載種別：研究論文（学術雑誌）  

The temperature dependence of the photoluminescence (PL) and absorption spectra of the 16-mer oligothiophene (16T) extremely diluted in polypropylene (PP) has been investigated to clarify the PL dynamics at room temperature of quasi-isolated conjugated polymers. Both of the PL and absorption spectra of 16T in PP are found to blueshift with increasing temperature, due to the thermal conformational change. The Stokes shift estimated by the difference of the 0-0 peak between the absorption and PL spectra is shown to Increase with temperature. It IS found that the time-resolved PL spectra at room temperature of 16T in PP exhibit a larger transient redshift than those at 4K. The increase of the Stokes shift is thus concluded to result from the enhanced transient redshift due to the conformational change The magnitude of the Stokes shift increasing with temperature is shown to be reduced in the case of 12-mer oligothiophene diluted in 1311 compared to that of 16T in PP This leads us to conclude that the thermal inhomogeneity increases with elongating the chain length It is also shown that the exciton migration occurs in the time scale of several hundreds of picoseconds and competes with decay of emission (C) 2009 Elsevier B V. All rights reserved

DOI： 10.1016/j.jlumin.2009.04.045

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1016/j.cplett.2009.10.077

掲載種別：研究論文（学術雑誌）  

The ultrafast relaxation kinetics of fucoxanthin in polar and non-polar solvents have been studied by femtosecond dispersed one-and two-photon pump-probe spectroscopies. Transient absorption kinetics of the lowest singlet S-1 (2(1)A(g)(-)) state and/or intramolecular charge transfer (ICT) state after excitation to the optically allowed S-2 (1(1)B(u)(+)) state depend strongly on solvent polarity. Transient absorption spectra and the kinetics of absorbance changes after direct two-photon excitation to S-1/ICT depend strongly on excitation energy in non-polar solvent. The results suggest that the ICT state is a distinct state from S-1 in polar solvent. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.cplett.2009.10.077

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevLett.103.187402

掲載種別：研究論文（学術雑誌）  

Bleaching probe spectroscopy performed for regioregular poly(3-hexylthiophene) diodes reveals that coexistent morphological phases determine the conducting and optical properties of conjugated polymer films. Photoinduced absorption measurements demonstrate that exciton migration occurs from lamella aggregates to morphological sites consisting of quasiuncoupled chains and that the latter sites determine steady-state photophysical properties. Spectroscopy synchronized with diode operation reveals that the morphological locations of injected carriers in polymer diodes vary with the applied bias.

DOI： 10.1103/PhysRevLett.103.187402

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.80.035118

掲載種別：研究論文（学術雑誌）  

Transient grating (TG) signals from beta-carotene were measured at various excitation energies (wavelengths). Clear coherent oscillations with a period of a few tens of femtoseconds were observed when the excitation energy was tuned in the vicinity of the absorption edge. It was found that the TG signal is very sensitive to the excitation energy. When the TG signal is measured near the absorption maximum, following the coherent spike at the origin of the time axis, weak coherent oscillations are observed superimposed on a slowly varying background. The rise time of this slowly varying background is 0.4 ps and is followed by the slow decay with a 5 ps time constant. As the excitation energy is decreased the coherent oscillations become more prominent. The coherent oscillations and the slowly varying background become very weak again when the excitation energy is lower than the absorption edge. The TG signals were calculated using two sets of energy and Feynman diagrams to investigate possible pathways of the electronic internal conversion and vibronic decoherence processes. The modeling indicates that the vibronic coherence, initially established by pumping into the excited state S-2, instantaneously decays due to relaxation into an intermediate state S-x, which is located between S-2 and S-1. Possible interpretation of the nature of the S-x state is discussed.

DOI： 10.1103/PhysRevB.80.035118

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1063/1.3152447

掲載種別：研究論文（学術雑誌）  

Temperature dependences (4-300 K) of photoluminescence (PL) and absorption spectra of 16-mer oligothiophene (16 T) extremely diluted in polypropylene (PP) have been investigated in order to clarify temperature effects on quasi-isolated conjugated polymers. The PL and absorption spectra are found to blueshift with increasing temperature. The reason for the blueshift is discussed by comparing models based on the refractive index of the solvent (PP) and on the thermal conformational change of 16 T. The blueshift is concluded to result from the thermal conformational change. Time-resolved PL spectra show a redshift of PL band following photoexcitation (spectral migration). The amount of the migration is shown to increase with increasing temperature. The increased migration is concluded to be due to the thermal conformational change. The temperature dependence of the effective conjugation length (ECL) of 16 T is calculated for the absorption and PL transitions. The calculation suggests that ECL is reduced at room temperature to two-thirds of the intrinsic chain length. The activation energy of the conformational change is estimated to be 22.4 meV from the temperature dependence of ECL. We demonstrate that the steady-state PL spectra are well reproduced by simple Franck-Condon analyses using a single Huang-Ryes factor over a wide temperature range. The analyses reveal features of temperature dependence in important spectral parameters such as the Stokes shift, linewidth, and Huang-Ryes factor.

DOI： 10.1063/1.3152447

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/pssc.200881304

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1002/pssc.200881344

掲載種別：研究論文（国際会議プロシーディングス）   共著区分：共著  

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.64.2.4.0_654_2

CiNii Article

掲載種別：研究論文（国際会議プロシーディングス）  

Ultrafast degenerate four-wave mixing (DFWM) signals of the regioregular (RR) poly(3-hexylthiophene) (P3HT) film have been investigated by the experiments using sub-20 fs pulses generated from a noncollinear optical parametric amplifier (NOPA) system. Strong DFWM signals were observed owing to a large third-order nonlinear susceptibility. chi((3)) of the RR-P3HT film. The time profile of the DFWM signals exhibits clear coherent oscillation on a decaying signal. The oscillation turn out to be caused by the C=C stretching mode that gives strong Raman signal. The time profile of the DFWM signal is simulated by a numerical calculation. The result of simulation reveals that decay constants of electronic population and of vibronic oscillation are 200 fs and 210 fs, respectively. This is the first determination of the decay constants for the RR-P3HT film. The obtained result demonstrates that the. chi((3)) signal of the RR-P3HT film decays very rapidly. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.200881304

掲載種別：研究論文（国際会議プロシーディングス）  

We investigate the third-order nonlinear optical property of a range of beta-carotene homologues, which have different numbers (n) of conjugated C=C double bonds from n = 7 to 15, by using third-harmonic generation Maker fringe technique. The results clearly show that there is a remarkable enhancement of the third-order optical nonlinearity when n = 15, which is a four fold increase compared with n = 11 (i.e. beta-carotene). (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.200881296

掲載種別：研究論文（国際会議プロシーディングス）  

The vibronic coherence of beta-carotene in benzene has been investigated by means of transient grating spectroscopy using sub 20-fs optical pulses. The coherent oscillations with a period of a few tens of femtoseconds have been clearly observed, which reflect the C-C and C=C stretching modes and the C-CH3 rocking mode of the polyene backbone. We found that the signal is very sensitive to the excitation wavelength. Calculations based on a Brownian oscillator model were performed. We show that the experimental results are well explained by properly considering the excitation pulse shapes. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssc.200881344

掲載種別：研究論文（国際会議プロシーディングス）  

We investigate transient grating signals in beta-carotene homologues by using sub-20-fs optical pulses. The results clearly show that shorter-chain carotenoids have a specific major channel of energy dissipation to the environment (the central C=C stretching mode) in the ground-state vibrational manifold, whereas the longer-chain carotenoids do not.

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.64.1.4.0_743_1

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.64.1.4.0_740_4

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.78.161101

掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.78.161101

掲載種別：研究論文（学術雑誌）  

We show that a very large enhancement of third-order optical nonlinearity (gamma) of pi-conjugated molecules can be realized without a major redshift of the absorption spectrum that disturbs optical transparency in the visible region. By changing the number (n) of C=C bonds of beta carotene (n=11) from 7 to 15, a remarkable 3.4-fold increase in the gamma value was observed when n=15 relative to that of beta carotene. This enhancement of gamma mainly originates from three-photon resonance of a lowest optically allowed excited state. The controversial higher-lying essential state is not important for generating the large value of gamma.

DOI： 10.1103/PhysRevB.78.161101

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.77.205118

掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.77.205118

掲載種別：研究論文（学術雑誌）  

Transient grating (TG) signals in 8-carotene homologues, by using sub-20-fs excitation pulses, were measured in order to investigate the dependence of the vibrational coherence dynamics on the pi-conjugation length of these carotenoids. The experimental TG traces can be well reproduced by computational simulations based on a Brownian oscillator model using the spectral density determined from their respective resonance Raman spectra and their previously reported excited-state population-relaxation times. The total dephasing times of the ground-state vibrational modes of the homologues were determined by applying a wavelet transformation of their coherent oscillations, which were observed in the experimental TG traces. The total dephasing time decreases as the number of conjugated C=C double bonds increases. The decoherence of the ground-state vibrational modes in the homologues is mainly caused by system-bath interactions. The dephasing time of the C-C stretching modes strongly depends on the conjugation length, whereas that of the C=C stretching does not. This trend clearly shows that shorter-chain carotenoids have a specific major channel of energy dissipation to the environment (the C=C stretching), whereas the longer-chain carotenoids do not.

DOI： 10.1103/PhysRevB.77.205118

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1007/s11120-007-9265-y

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1007/s11120-007-9266-x

掲載種別：研究論文（学術雑誌）  

Typical purple bacterial photosynthetic units consist of supra-molecular arrays of peripheral (LH2) and core (LH1-RC) antenna complexes. Recent atomic force microscopy pictures of photosynthetic units in intact membranes have revealed that the architecture of these units is variable (Scheuring et al. (2005) Biochim Bhiophys Acta 1712:109-127). In this study, we describe methods for the construction of heterologous photosynthetic units in lipid-bilayers from mixtures of purified LH2 (from Rhodopseudomonas acidophila) and LH1-RC (from Rhodopseudomonas viridis) core complexes. The architecture of these reconstituted photosynthetic units can be varied by controlling ratio of added LH2 to core complexes. The arrangement of the complexes was visualized by electron-microscopy in combination with Fourier analysis. The regular trigonal array of the core complexes seen in the native photosynthetic membrane could be regenerated in the reconstituted membranes by temperature cycling. In the presence of added LH2 complexes, this trigonal symmetry was replaced with orthorhombic symmetry. The small lattice lengths for the latter suggest that the constituent unit of the orthorhombic lattice is the LH2. Fluorescence and fluorescence-excitation spectroscopy was applied to the set of the reconstituted membranes prepared with various proportions of LH2 to core complexes. Remarkably, even though the LH2 complexes contain bacteriochlorophyll a, and the core complexes contain bacteriochlorophyll b, it was possible to demonstrate energy transfer from LH2 to the core complexes. These experiments provide a first step along the path toward investigating how changing the architecture of purple bacterial photosynthetic units affects the overall efficiency of light-harvesting.

DOI： 10.1007/s11120-007-9260-3

掲載種別：研究論文（学術雑誌）  

Nonlinear optical responses of bacteriochlorophyll a (BChl a) were investigated by means of the three-pulse four-wave mixing (FWM) technique under the resonant excitation into the Q(y) band. The experimental results are explained by a theoretical model calculation including the Brownian oscillation mode of the solvent. We have determined the spectral density, which is the most important function with which to calculate optical signals. The linear absorption spectrum can be reproduced fairly well when the vibronic oscillation modes of the solvent together with those of BChl a are properly taken into consideration. The FWM signal was also calculated using the spectral density. It was found that a simple two-level model could not explain the experimental result. The effect of the higher-order interactions is discussed.

DOI： 10.1007/s11120-007-9266-x

掲載種別：研究論文（学術雑誌）  

The third-order nonlinear optical responses of beta-carotene and its homologue having a conjugation-double bond n = 15 have been investigated using sub-20 fs ultra-short optical pulses in order to clarify the dissipation processes of excess energy. Using the four-wave mixing spectroscopy, we observed a clear coherent oscillation with a period of a few tens of femtoseconds. The spectral density of these molecules was estimated that allowed the theoretical linear and nonlinear optical signals to be directly compared with the experimental data. Calculations based on the Brownian oscillator model were performed under the impulsive excitation limit. We show that the memory of the vibronic coherence generated upon the excitation into the S-2 state is lost via the relaxation process including the S-1 state. The vibronic decoherence lifetime of the system was estimated to be 1 ps, which is about 5 times larger than the life time of the S-2 state (similar to 150 fs) determined in previous studies. The role of coherence and the efficient energy transfer in the light-harvesting antenna complexes are discussed.

DOI： 10.1007/s11120-007-9265-y

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.63.2.4.0_649_2

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.63.1.4.0_738_4

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.63.1.4.0_738_3

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.63.2.4.0_665_4

CiNii Article

掲載種別：研究論文（学術雑誌）  

The photoluminescence (PL) dynamics of poly [2-methoxy-5 -(2'-ethyl-hexyloxy)- 1,4-phenylene vinylenel (MEH-PPV) blended in host polymer (polypropylene, PP) matrix as well as that in the neat film has been studied. The concentration of MEH-PPV in the PP blend is designed to be fairly low (0.01 wt %) in order to observe the intrinsic intrachain PL property of MEH-PPV in the solid state. The steady-state 0-0 PL band of the blend sample shows a blue-shift of 0. 12 eV with respect to that of the neat film of MEH-PPV. The PL-excitation (PLE) spectra of the blend sample exhibit definite vibronic structure, and hence we can determine the magnitude of the Stokes shift as 0.06 eV. The blend sample shows a single-exponential PL decay at 4 K with a time constant of 850 ps. We emphasize that this single-exponential-type PL decay is an intrinsic property of the intrachain PIL species. Time-resolved PIL measurements confirm dynamical red-shift of the PL band in the neat film, whereas this trend is not found in the case of the PP blend. These observations indicate that the energy transfer between finite segments, which can cause exciton migration, is much less efficient within the isolated MEH-PPV polymer chain compared to the case of the interchain transfer. The time-resolved measurements further demonstrate that the Stokes shift identified in the blend sample takes place at the early stage within 50 ps following photoexcitation. We attribute this Stokes shift to the rapid increase of the planarity of the MEH-PPV chain caused by the torsion of some constituent phenyl rings following photoexcitation. Finally, based on an argument on the different magnitudes of Stokes shift between the blend sample and the neat film, we conclude that the PL of MEH-PPV in the neat film predominantly occurs at the site of interchain excitations via the interchain migration of excitons.

DOI： 10.1021/jp073492b

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.75.155110

掲載種別：研究論文（学術雑誌）  

Linear and second-order nonlinear optical (NLO) properties of a single crystal of N-benzyl-2-methyl-4-nitroaniline (BNA) have been determined. The refractive indices of the crystal were measured in the visible to near infra-red region. The Maker-fringe and phase-matching methods were used to determine the magnitudes of the d-tensor components for the second harmonic generation when excited the crystals at 1064 nm. They were d(333) = 234 +/- 31, d(322) = 15.6 +/- 0.9, and d(311) similar to 0 pm/V. The value of d(333) is the largest value reported for any yellow-colored NLO materials and suggests that crystals of BNA will be very effective for terahertz wave generation.

DOI： 10.1143/JJAP.46.1528

掲載種別：研究論文（学術雑誌）  

DOI： 10.1103/PhysRevB.75.155110

掲載種別：研究論文（学術雑誌）  

The four-wave mixing signal of beta-carotene measured under the resonant excitation is reported. A clear coherent oscillation with a period of a few tens of femtoseconds was observed. We have estimated the line broadening function required to simulate this oscillation behavior. The parameters, including the solvation effect, which are essential for calculating the optical signals have also been determined. The validity of our simulation has been evaluated by comparing the theoretically calculated linear and nonlinear optical signals with the experimental results. It was found that in addition to the C - C and C = C stretching modes the methyl in-plane rocking mode significantly contributes to the optical responses of beta-carotene. Calculations based on the Brownian oscillator model were performed under the impulsive excitation limit, and we find that the memory of the vibronic coherence generated in the S-2 state is lost via relaxation processes, which include the S-1 state. Comparison between the simulation and experiment revealed that the two-photon absorption process plays an important role in the very early optical process taking place in beta-carotene. The vibronic decoherent time of the system is estimated to be 1 ps, which is about five times longer than the population lifetime of the S-2 state determined in the previous studies. The possible relationship between the lifetime of the vibronic coherence and the efficient energy transfer in light-harvesting antenna complexes is discussed.

DOI： 10.1103/PhysRevB.75.155110

掲載種別：研究論文（学術雑誌）   共著区分：共著  

DOI： 10.1103/PhysRevB.75.125315

掲載種別：研究論文（学術雑誌）  

Transient anisotropic reflectivity change spectra of InP quantum dots have been observed by means of two-color pump-probe spectroscopy. The results show a fast decay component with a lifetime of 100-200 ps which depends on the probe energy, followed by the slow decay component of similar to 1 ns. The reflectivity change spectra have a dispersive shape having a maximum on the higher energy side of the photoluminescence (PL) band by 80 meV, and a dip located at the maximum of the PL band. Interestingly, the reflectivity change signals observed for the [1 (1) over bar0] and [110] polarizations have the opposite sign when the probe energy is set between the first and second exciton states. The temporal change of spectra is simulated by means of a Monte Carlo method, and the model is found to well reproduce the experimental result. Further, the model enables us to evaluate the microscopic exciton parameters of single quantum dots by macroscopic observations. The oscillator strengths along the [110] and [1 (1) over bar0] directions at the PL peak energy are evaluated to be f(x)=0.37 and f(y)=0.71, respectively. The oscillator strength is about five times smaller than simple theoretical estimates. This suggests a small overlap of the envelope functions which is consistent with the existence of a permanent dipole moment observed in these QDs.

DOI： 10.1103/PhysRevB.75.125315

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.62.1.4.0_736_3

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.62.2.4.0_782_3

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.62.2.4.0_769_2

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.62.2.4.0_769_1

CiNii Article

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.62.2.4.0_768_2

CiNii Article

掲載種別：研究論文（学術雑誌）  

A single crystal of N-benzyl 2-methyl-4-nitroaniline (BNA) whose dimensions were 8 x 10 mm (diameter x length) was grown using a vertical Bridgman method with sufficient optical transparency for spectroscopic use. Polarized reflection spectra of the crystal were measured in order to determine its linear optical parameters (refractive indices and extinction coefficients). The relative magnitudes of the d-tensor components of the crystal were determined to be d(333) = (17 +/- 9) x d(322,) d(322) &gt; d(311), d(311) similar to 0 from polarization dependencies of the second harmonic generation. These results are in disagreement with previously reported theoretical studies, in which the effects of intermolecular interactions were completely neglected. Here, we have included these intermolecular interactions in the calculations assuming the presence of supra-molecular clusters. We conclude that the anomalous enhancement of d(333) is due to the interactions along the direction of the hydrogen bonds in the crystal and the resonance effect.

DOI： 10.1143/JJAP.45.8676

掲載種別：研究論文（学術雑誌）  

DOI： 10.11316/jpsgaiyo.60.1.4.0_681_1

CiNii Article

掲載種別：研究論文（学術雑誌）  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

掲載種別：研究論文（学術雑誌）   共著区分：共著  

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総ページ数：411   担当ページ：151-194, 239-261   著書種別：学術書  

掲載種別：記事・総説・解説・論説等（学術雑誌）  

CiNii Article

掲載種別：記事・総説・解説・論説等（学術雑誌）  

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掲載種別：記事・総説・解説・論説等（学術雑誌）  

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掲載種別：記事・総説・解説・論説等（学術雑誌）  

J-GLOBAL

掲載種別：記事・総説・解説・論説等（学術雑誌）  

J-GLOBAL

掲載種別：記事・総説・解説・論説等（学術雑誌）  

CiNii Article

掲載種別：記事・総説・解説・論説等（学術雑誌）  

J-GLOBAL

掲載種別：記事・総説・解説・論説等（学術雑誌）  

CiNii Article

掲載種別：記事・総説・解説・論説等（学術雑誌）  

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