Abstract： The third-order optical nonlinearities and responses of poly(methyl methacrylate) (PMMA) coating films containing J-like aggregates of a thiadicarbocyanine dye, 3,3’-diethyl-2,2’-thiadicarbocyanine iodide (DTDCI), are measured by degenerate four-wave mixing (DFWM) technique under resonant conditions. The temporal profiles of the DFWM signal of PMMA coating films containing J-like aggregates of DTDCI are found to consist of three components: i.e., the coherent instantaneous nonlinear response (electronic response) and the two slow responses with decay time constants of about 0.8ps and about 7.0ps. The electronic component of the effective third-order nonlinear susceptibility, x(3)e, of one of the present films is as high as about 2.1 × 10-8esu, and the figure of merit of third-order nonlinearity F (F =x(3)/α) is evaluated to be about 1.9 × 10-13esu cm at 850nm.
(Optical properties of bulk materials and thin films)
引用本文:
LI Zhong-Yu;JIN Zhao-Hui;KASATANI Kazuo;OKAMOTO Hiroaki. Resonant Third-Order Optical Nonlinearities of Poly(methyl methacrylate) Films Containing J-Like Aggregates of a Thiadicarbocyanine Dye[J]. 中国物理快报, 2005, 22(10): 2571-2575.
LI Zhong-Yu, JIN Zhao-Hui, KASATANI Kazuo, OKAMOTO Hiroaki. Resonant Third-Order Optical Nonlinearities of Poly(methyl methacrylate) Films Containing J-Like Aggregates of a Thiadicarbocyanine Dye. Chin. Phys. Lett., 2005, 22(10): 2571-2575.
2005, Vol. 22 
