| Resonant Third-Order Optical Nonlinearities of Poly（methyl methacrylate） Films Containing J-Like Aggregates of a Thiadicarbocyanine Dye |
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| 引用本文： | 李忠玉 金朝辉 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):2571-2574. |
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| 作者姓名： | 李忠玉 金朝辉 KASATANI Kazuo OKAMOTO Hiroaki |
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| 作者单位： | [1]Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan |
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| 基金项目： | Supported partially by a Grant-in-Aid for Science Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan （No 15560033）. |
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| 摘 要： | 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 （DTDC1）, 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 DTDC1 are found to consist of three components： i.e., the coherent instantaneous nonlinear response （electronic response） and the two slow responses uqth decay time constants of about 0.8ps and about 7.0ps. The electronic component of the effective third-order nonlinear susceptibility, χc^（3）, of one of the present films is as high as about 2.1×10^-8 esu, and the figure of merit of third-order nonlinearity F （F=χ^（3）/α） is evaluated to be about 1.9 ×10^-13 esu cm at 850nm.
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| 关 键 词： | 聚乙烯薄膜 非线性光学特性 PMMA DFWM |
| 收稿时间： | 2005-06-22 |
| 修稿时间： | 2005-06-22 |
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