Second harmonic generation in surface crystallized 30GeS(2) center dot 35Ga(2)S(3) center dot 35AgCl chalcohalide glasses

作者：Zheng, Xiaolin; Tao, Haizheng^*; Lin, Changgui; Gu, Shaoxuan; Dong, Guoping; Zhao, Xiujian

来源：Optical Materials, 2009, 31(10): 1434-1438.

DOI：10.1016/j.optmat.2009.01.012

• Chalcohalide glasses
• Surface crystallization
• Second harmonic generation
• AgGaGeS4

The infrared transmitting surface crystallized chalcohalide glasses containing nontoxic and excellent nonlinear optical AgGaGeS4 crystaillites were fabricated by heat-treatment of the as-prepared 30GeS(2) center dot 35Ga(2)S(3) center dot 35AgCl chalcohalide glass at 350 degrees C(T-g -10 degrees C) for 24 h. An intensive second harmonic generation (SHG) was observed clearly using the Maker fringe technique, and the origin of SHG was mainly ascribed to the AgGaGeS4 nonlinear optical crystaillites contained in the surface crystallized layer. The thickness of the surface crystallized layer showing SHG activation is approximate 50 mu m. The chi((2)) susceptibility of the prepared surface crystallized 30GeS(2) center dot 35Ga(2)S(3) center dot 35AgCl chalcohalide glass is calculated to be about 12.4 pm/V at a fundamental wavelength of 1064 nm, which indicates a promising nonlinear optical material in the infrared spectral region.

• 出版日期2009-8
• 单位武汉理工大学