Ultrafast Optical Properties of C 70 Thin Film
1996; Institute of Physics; Volume: 13; Issue: 9 Linguagem: Inglês
10.1088/0256-307x/13/9/008
ISSN1741-3540
AutoresCongfang Wang, Xi‐Cheng Ai, Zongju Xia, Yinghua Zou, Qian Jiang, Shixiong Qian,
Tópico(s)Nonlinear Optical Materials Studies
ResumoThe relaxation of optically excited carrier in C70 thin film fabricated by physical jet deposition was investigated by femtosecond pump-probe measurements. A transient decrease in transmission was observed indicating induced absorption. In comparison to C60 thin film the initial response of C70 film is laser pulse limited and the long lived component has smaller magnitude. The third order optical nonlinear susceptibility of C70 thin film was determined to be χ(3) = 3.3 × 10-11 esu by femtosecond time-resolved optical Kerr effect. From the primarily pulse limited response the dephasing time of C70 thin film has been proved to be shorter than the laser pulse width.
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