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Femtosecond optical Kerr effect study of Ge10As40S30Se20 film |
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| Authors: | Qiming Liu Xiujian Zhao Jun Mi |
| Institution: | a Key Laboratory of Silicate Materials Science and Engineering, (Wuhan University of Technology), Ministry of Education, 122 Luoshi Road, Hongshan District, Wuhan, Hubei 430070, People's Republic of China b Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics, P.O. Box 800-211, Shanghai 201800, People's Republic of China c School of Information Sciences and Engineering, Fudan University, Shanghai 200433, People's Republic of China d Department of Physics, Fudan University, Shanghai 200433, People's Republic of China |
| Abstract: | The results of the femtosecond optical heterodyne detection of optical Kerr effect at 805 nm with the 80 fs ultrafast pulses in amorphous Ge10As40S30Se20 film is reported in this paper. The film shows an optical non-linear response of 200 fs under ultrafast 80 fs-pulse excitation, and the values of real and imaginary parts of non-linear susceptibility χ(3) were 9.0×10−12 and −4.0×10−12 esu, respectively. The large third-order non-linearity and ultrafast response are attributed to the ultrafast distortion of the electron orbits surrounding the average positions of the nucleus of Ge, As, S and Se atoms. This Ge10As40S30Se20 chalcogenide glass would be expected as a promising material for optical switching technique. |
| Keywords: | 78 66 J 42 65 R 33 55 F |
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