Z-scan determination of third-order nonlinear optical properties of Poly(4,4'-diazobenzene-2,5-thiophene)

Huawei Shao; Mei Xiang; Zhenhong Jia; Xiaoyi Lü

doi:10.1117/12.810995

2 February 2009 Z-scan determination of third-order nonlinear optical properties of Poly(4,4'-diazobenzene-2,5-thiophene)

Huawei Shao, Mei Xiang, Zhenhong Jia, Xiaoyi Lü

Author Affiliations +

Proceedings Volume 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications; 716030 (2009) https://doi.org/10.1117/12.810995
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

A novel material,Poly(4,4'-diazobenzene-2,5-thiophene) (PDABTh) was synthesized and its third-order optical nonlinearity was studied using Z-scan technique with 20 ps laser pulse at 1064 nm. We measured the nonlinear refractive index n₂=8.4x10-19 m²/w with positive sign and nonlinear absorption coefficient β=1.8x10^-12 m/w with reverse saturable absorption. The molecular second-order hyperpolarizability was calculated to be 4.2x10^-30 esu. The special Π-electron structure may contribute to these relatively large non-linear optical properties. This suggests that the PDABTh may have a potential application in nonlinear optical devices.

Citation Download Citation

Huawei Shao, Mei Xiang, Zhenhong Jia, and Xiaoyi Lü "Z-scan determination of third-order nonlinear optical properties of Poly(4,4'-diazobenzene-2,5-thiophene)", Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716030 (2 February 2009); https://doi.org/10.1117/12.810995

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