Femtosecond coherent anti-Stokes Raman beats between vibration modes in PVA film

Author

Kozai, T. ; Yamashita, S. ; Hirochi, K. ; Miyagawa, H. ; Tsurumachi, N. ; Koshiba, S. ; Nakanishi, S. ; Itoh, H.

Author_Institution

Dept. of Adv. Mater. Sci., Kagawa Univ., Takamatsu, Japan

fYear

2011

fDate

Aug. 28 2011-Sept. 1 2011

Firstpage

193

Lastpage

195

Abstract

We have performed femtosecond time-resolved coherent anti-Stokes Raman spectroscopy (CARS) to study the vibrational dynamics of Polyvinyl alcohol (PVA) film. We observed CARS signal beats between vibrational modes in PVA and measured the coherent vibrational relaxation rates of CH and OH stretch modes. We found that the coherent vibrational relaxation of anti-symmetric CH stretch mode in PVA is much faster than that of symmetric mode, probably due to faster resonant vibrational energy transfer to adjacent CH groups in a polymer chain.

Keywords

Raman spectroscopy; coherent antiStokes Raman scattering; polymers; time resolved spectroscopy; vibrational modes; CARS; PVA film; Polyvinyl alcohol film; antisymmetric stretch mode; coherent vibrational relaxation; femtosecond coherent antiStokes Raman beat; femtosecond time-resolved coherent antiStokes Raman spectroscopy; vibration modes; vibrational dynamics; Energy exchange; Films; Fitting; Raman scattering; Time frequency analysis; Ultrafast optics; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics Conference & Lasers and Electro-Optics (CLEO/IQEC/PACIFIC RIM), 2011

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4577-1939-4

Type

conf

DOI

10.1109/IQEC-CLEO.2011.6193833

Filename

6193833