Nonlinear optical responses of C60-toluene solution

✍ Scribed by Lina Yang; R. Dorsinville; R. Alfano

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 452 KB
• Volume: 226
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00766-7

✦ Synopsis

The third-order optical nonlinearities of C&-toluene solution were studied by time-resolved degenerate four-wave mixing at 532 nm. The time response of the nonlinearities was measured for different polarization configurations to isolate the singlet excited state lifetime from the other relaxation components. The rise time of the four-wave mixing signal was found to shorten as the laser excitation energy increases. The rise time change is attributed to the larger singlet-singlet excited state absorption cross section. This assumption was supported by theoretical tits to the experimental data using rate equations and analysis, and by Z-scan measurements performed at the same wavelength.