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题名:	Tuning linear and nonlinear optical properties of wurtzite GaN by c-axial stress
作者:	郭光宇 Guo, Guang-Yu
贡献者:	應物所
日期:	2009.09
上传时间:	2014-01-24 12:21:16 (UTC+8)
摘要:	We study the linear and nonlinear optical properties of wurtzite GaN under c-axial stress field, using density functional theory calculations. The fully structural optimization at each c-axial strain was performed. The calculated dielectric functions show that tensile c-axial strain effectively improves the linear optical efficiency, especially for the band-edge transitions, and significantly increase the mobility of electrons in the conduction band. Second-order nonlinear optical susceptibilities show that the tensile c-axial strain will enhance the zero- and low-frequency nonlinear responses of GaN. The enhancement of the nonlinear optical property is explained by the reduction of the polarization of wurtzite GaN under tensile c-axial strains. Based on these findings, we propose a method for improving the electrical and optical properties of the crystal through imposing appropriate stress on the high symmetry crystalline directions.
關聯:	Journal of physics. D, Applied physics, 42,185107
資料來源:	http://dx.doi.org/10.1088/0022-3727/42/18/185107
数据类型:	article
DOI 連結:	http://dx.doi.org/10.1088/0022-3727/42/18/185107
DOI:	10.1088/0022-3727/42/18/185107
显示于类别:	[應用物理研究所 ] 期刊論文

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