標題: Vibrational and electronic relaxation in MEH-PPV using few cycle pulses
作者: Kobayashi, Takayoshi
Yamashita, Munenori
Du, Juan
Zhang, Jun
Iwakura, Izumi
電子物理學系
Department of Electrophysics
公開日期: 30-七月-2013
摘要: The electronic population decay time is determined to be about 500 fs in (poly-[2-methoxy-5-(2'-ethyl-hexyloxy)-p-phenylenevinylenel (MEH-PPV) using 5.7 fs pulses. The ultrafast electronic dephasing time and the self-trapping time of free exciton to form an exciton polaron is determined as 25 +/- 2 fs and 50 +/- 23 fs, respectively. Real-time spectrogram analysis reveals dynamic mode coupling among the high-frequency and low-frequency modes. The energy-ladder descent vibrational process is clarified using the first moment of the difference absorption spectrum. The phase relaxation time is calculated from the widths of the Fourier spectra of several strongly coupled modes. (C) 2013 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.cplett.2013.06.029
http://hdl.handle.net/11536/22178
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2013.06.029
期刊: CHEMICAL PHYSICS LETTERS
Volume: 579
Issue: 
起始頁: 51
結束頁: 57
顯示於類別:期刊論文


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