ANISOTROPIC INFRARED-UP-CONVERSION LUMINESCENCE GENERATION IN POROUS SILICON
WANG JIAN (王健)a, JIANG HONG-BING (蒋红兵)a, WANG WEN-CHENG (王文澄)a, ZHENG JIA-BIAO (郑家骠)a, ZHANG FU-LONG (张甫龙)b, HAO PING-HAI (郝平海)b, HOU XIAO-YUAN (侯晓远)b, WANG XUN (王迅)b
a Laboratory of Laser Physics and Optics, Fudan University, Shanghai 200433, China; b Surface Physics Laboratory, Fudan University, Shanghai 200433, China
Abstract It is demonstrated in this paper that the infrared-up-conversion luminescence generation from porous silicon, considered as an enhanced third-order nonlinear optical effect by the recent work, is anisotropic as the polarization vector of normally incident fundamental light is rotated. A new method has been used to determine the anisotropy parameter $\sigma$ of the third-order nonlinear optical tensor $\chi$(3). Due to the sensitivity of $\sigma$ to the crystal structure and microscopic electronic properties, the difference in $\sigma$′s between porous and crystalline silicon, particularly in their phases, demonstrates that the nanometer structure of porous silicon induces a dra-matic change of the electronic band structure, but the strongly anisotropic crystal property remains unchanged.
Received: 08 September 1992
Accepted manuscript online:
STUDY OF PHOTON-TRAPPING PHENOMENON IN POROUS SILICON LAYER CHEN LIANG-YAO (陈良尧), HOU XIAO-YUAN (侯晓远), HUANG DA-MING (黄大鸣), ZHANG FU-LONG (张甫龙), FENG XING-WEI (冯星伟), YANG MIN (杨敏), SU YI (苏毅), QIAN YOU-HUA (钱佑华), WANG XUN (王迅). Chin. Phys. B, 1994, 3(8): 595-607.
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