期刊
OPTICS AND LASER TECHNOLOGY
卷 42, 期 1, 页码 230-236出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2009.06.018
关键词
Nonlinear optics; Z-scan; Reverse saturable absorption (RSA)
资金
- Department of Information Technology (D.I.T.), Govt. of India.
An experimental investigation of the third-order nonlinear optical properties of new poly{2-{5-[3,4-ditetradecyloxy-5-(1,3,4-oxadiazol-2-yl)thiophen-2-yl]- 1,3,4-oxadiazol-2-yl)pyridine) (P) in tetrahydrofuran (THF) solution and in solid poly(methylmethacrylate) (PMMA) matrix, by Z-scan technique is reported. The Z-scan traces reveal that the composite films exhibit large negative nonlinear refractive index of the order 10(-10)esu. The excited-state absorption cross-section was found to be larger than the ground-state absorption indicating that the operating nonlinear process is reverse saturable absorption (RSA). The new polymer P exhibits good optical power limiting properties in the nanosecond regime in solution and as well in solid PMMA matrix. (c) 2009 Elsevier Ltd. All rights reserved.
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