研究者情報 | 神奈川大学

イワクラ　イズミ Iwakura Izumi 岩倉　いずみ所属神奈川大学化学生命学部応用化学科神奈川大学大学院工学研究科工学専攻（応用化学領域）職種教授
言語種別	英語
発行・発表の年月	2008/06
形態種別	学術雑誌
査読	査読あり
標題	Excitonic and vibrational nonlinear processes in a polydiacetylene studied by a few-cycle pulse laser.
執筆形態	共著
掲載誌名	New Journal of Physics,
掲載区分	国外
巻・号・頁	10,pp.065016(15pp)
国際共著	国際共著
著者・共著者	Takayoshi Kobayashi, Izumi Iwakura, Atsushi Yabushita
概要	High-density excitation of exciton induces the faster decay of absorbance change due to exciton-exciton interaction originated from the Auger recombination process. Experimental results clarified the dynamics of the exciton and the bimolecular quenching rate and the jump rate of exciton were determined to be 5.2x10-9 cm3 s-1 and 5.2x10-9 s-1, respectively. The intensity modulation of electronic transition under high-density excitation with 5-fs pulse was analyzed to observe the Fourier power spectrum of the molecular vibration modes and revealed the existence of a combination tone (2726 cm-1) of the C-C (1241 cm-1) and the C=C (1485 cm-1) stretching modes. This indicates that the highly excited state induced by the Auger process results in the fusion of vibrational quantum states. Difference frequency generation of the vibrational modes also takes place in the same process due to the fission of the vibrational quanta stimulated by the interaction of the two vibrational modes.
DOI	https://doi.org/10.1088/1367-2630/10/6/065016
researchmap用URL	https://iopscience.iop.org/article/10.1088/1367-2630/10/6/065016