Chin. Phys. Lett.  2005, Vol. 22 Issue (9): 2282-2285    DOI:
Original Articles |
Large Third-Order Optical Nonlinearity and Fast Response of a Squarylium Dye
LI Zhong-Yu;JIN Zhao-Hui;KASATANI Kazuo;OKAMOTO Hiroaki
Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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LI Zhong-Yu, JIN Zhao-Hui, KASATANI Kazuo et al  2005 Chin. Phys. Lett. 22 2282-2285
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Abstract The third-order optical nonlinearities and responses of a squarylium dye, 2,4-di-3-guaiazulenyl-1,3-dihydroxycyclo\-butenediylium dihydroxide, in tetrahydrofuran (THF) solution and in polystyrene (PS) coating films are measured by the femtosecond degenerate four-wave mixing technique under resonant conditions. The molecular hyperpolarizability g of the squarylium dye in the THF solution is determined to be 3.0 × 10-29,esu at 764nm, and its electronic component γe is determined to be 1.1 × 10-29esu. The third-order nonlinear susceptibility x(3) of one of the present PS coating films containing the squarylium dye is as high as 3.1 × 10-8esu at 800nm, and its electronic component x(3)-e is 1.3 × 10-8esu.
Keywords: 42.65.An      42.70.Nq     
Published: 01 September 2005
PACS:  42.65.An (Optical susceptibility, hyperpolarizability)  
  42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2005/V22/I9/02282
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JIN Zhao-Hui
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OKAMOTO Hiroaki
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