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Chin. Phys., 2005, Vol. 14(3): 551-555    DOI: 10.1088/1009-1963/14/3/022

Structure dependence of ultrafast third-order optical nonlinearity for Ge—Ga—Cd sulfide glasses

Wang Zhen-Weia, Liu Chun-Linga, Xiang Honga, Gong Qi-Huanga, Wang Xue-Fengb, Zhao Xiu-Jianb, Gu Shao-Xuanb, Yu Jia-Guoc
a Department of Physics & State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China; b Key Laboratory for Silicate Materials Science and Engineering (Wuhan University of Technology), Ministry of Education, Wuhan 430070, China; c State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Abstract  Ultrafast third-order nonlinear optical responses of GeS2—Ga2S3—CdS glasses have been measured by using femtosecond time-resolved optical Kerr effect (OKE) technique at the wavelengths of 820nm and 640nm respectively. The experimental results show that GeS2—Ga2S3—CdS glasses have large femtosecond third-order optical nonlinear responses and their OKE signals vary considerably with the composition. The relationship of structure-property is discussed by means of Raman spectroscopy analysis, suggesting that the tetrahedron unit [GeS4] or [GaS4] plays an important role in the ultrafast third-order nonlinear optical response. In addition, the experimental results also reveal that the ultrafast third-order optical nonlinearity of these glasses does not obey the Miller rule.
Keywords:  ultrafast spectroscopy      chalcogenide glasses      third-order optical nonlinearity  
Received:  31 May 2004      Revised:  16 November 2004      Published:  02 March 2005
PACS:  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
  42.65.Hw (Phase conjugation; photorefractive and Kerr effects)  
  42.70.Ce (Glasses, quartz)  
  78.30.Ly (Disordered solids)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10204003, 90101027, 90206003 and 50125205), the National Key Basic Research Special Foundation of China (Grant No TG1999075207) and by Chinese Academy of Sciences, and the Ni

Cite this article: 

Wang Zhen-Wei, Wang Xue-Feng, Liu Chun-Ling, Zhao Xiu-Jian, Xiang Hong, Yu Jia-Guo, Gong Qi-Huang, Gu Shao-Xuan Structure dependence of ultrafast third-order optical nonlinearity for Ge—Ga—Cd sulfide glasses 2005 Chin. Phys. 14 551

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