Title :
Nonlinear Raman processes in polydiacetylenes
Author :
Kobayashi, Takayoshi ; Yoshizawa, Masayuki ; Hattori, Yasuhiro
Author_Institution :
Dept. of Phys., Tokyo Univ., Japan
Abstract :
In conclusion, we developed a new time resolved Raman spectroscopy and the new Raman peak due to self-trapped excitons in polydiacetylene (PDA) has been observed at 1200 cm for the first time by the femtosecond time-resolved Raman gain spectroscopy. The observed Raman signals indicate the butatriene-like structure due to the formation of the self trapped exciton (STE) after the geometrical relaxation from the acetylene-like structure in the free exciton (FE) state
Keywords :
Raman spectroscopy; excited states; excitons; high-speed optical techniques; nonlinear optics; optical polymers; time resolved spectroscopy; 1200 cm-1; Raman peak; Raman signals; acetylene-like structure; butatriene-like structure; femtosecond time-resolved Raman gain spectroscopy; free exciton state; geometrical relaxation; nonlinear Raman processes; polydiacetylene; polydiacetylenes; self trapped exciton; self-trapped excitons; time resolved Raman spectroscopy; Excitons; Laser excitation; Physics; Polymers; Probes; Pulse amplifiers; Raman scattering; Spectroscopy; Stationary state; Ultrafast electronics;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 1994. NLO '94 IEEE
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1473-5
DOI :
10.1109/NLO.1994.470873
