Third-order optical nonlinearities of naphthalocyanine derivatives measured by resonant femtosecond degenerate four-wave mixing technique

被引：26

作者：

Fu, G ^{[1
]}

Yoda, T ^{[1
]}

Kasatani, K ^{[1
]}

Okamoto, H ^{[1
]}

Takenaka, S ^{[1
]}

机构：

[1] Yamaguchi Univ, Fac Engn, Dept Adv Mat Sci & Engn, Ube, Yamaguchi 7558611, Japan

来源：

SYNTHETIC METALS | 2005年 / 155卷 / 01期

关键词：

third-order optical nonlinearities; molecular hyperpolarizability; degenerate four-wave mixing; naphthalocyanines; resonant conditions;

D O I：

10.1016/j.synthmet.2005.05.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The third-order optical nonlinearities of several naphthalocyanine derivatives were measured under resonant conditions by the femtosecond degenerate four-wave mixing (DFWM) technique. Temporal profiles of the DFWM signal were measured with a time resolution of 0.3 ps, and were found to consist of at least two components, the coherent instantaneous nonlinear response and the slow response with a decay time constant longer than several hundred picoseconds. The latter can be attributed to the long-lived excited state and molecular rotational relaxation. The electronic molecular hyperpolarizability, gamma(e), was evaluated to be in the range (2.1-7.5) x 10(-29) esu for these macrocycles, two orders of magnitude greater than the nonresonant values. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：68 / 72

页数：5

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