Sub-5-fs resolved nonlinear optical processes in polydiacetylene

Takayoshi Kobayashi; Mitsuhiro Ikuta; Yoshiharu Yuasa

doi:10.1117/12.601485

28 January 2005 Sub-5-fs resolved nonlinear optical processes in polydiacetylene

Takayoshi Kobayashi, Mitsuhiro Ikuta, Yoshiharu Yuasa

Proceedings Volume 5646, Nonlinear Optical Phenomena and Applications; (2005) https://doi.org/10.1117/12.601485
Event: Photonics Asia, 2004, Beijing, China

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.

Citation Download Citation

Takayoshi Kobayashi, Mitsuhiro Ikuta, and Yoshiharu Yuasa "Sub-5-fs resolved nonlinear optical processes in polydiacetylene", Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); https://doi.org/10.1117/12.601485

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