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Proceedings Paper

Sub-5-fs resolved nonlinear optical processes in polydiacetylene
Author(s): Takayoshi Kobayashi; Mitsuhiro Ikuta; Yoshiharu Yuasa
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Paper Abstract

Molecular vibration of several modes in blue-phase polydiacetylene-3- butoxycarbonylmethylurethane (PDA-3BCMU) was real-time observed by 5-fs pump-probe measurement. The contribution of the vibrational wavepackets in the ground state and in the ground state and in the excited state in the signal were separated by multi-channel measurement. The C=C stretching mode in the ground state starts to oscillate π-out-of-phase with the C≡C stretching mode. The structure of PDA-3BCMU in the geometrically relaxed state is not pure butatriene-type but more like acetylene-type. The frequencies of C=C and C≡C stretching modes there were determined by singular value decomposition method to be 1472 ± 6 cm-1 and 2092 ± 6 cm-1, respectively. The double and triple bond stretching frequencies in the ground state which are 1463 ± 6 cm-1 2083 ± 6 cm-1, respectively.

Paper Details

Date Published: 28 January 2005
PDF: 12 pages
Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.601485
Show Author Affiliations
Takayoshi Kobayashi, Univ. of Tokyo (Japan)
Mitsuhiro Ikuta, Univ. of Tokyo (Japan)
Yoshiharu Yuasa, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5646:
Nonlinear Optical Phenomena and Applications
Qihuang Gong; Yiping Cui; Roger A. Lessard, Editor(s)

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