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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/63522

    Title: Tuning linear and nonlinear optical properties of wurtzite GaN by c-axial stress
    Authors: 郭光宇
    Guo, Guang-Yu
    Contributors: 應物所
    Date: 2009.09
    Issue Date: 2014-01-24 12:21:16 (UTC+8)
    Abstract: 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.
    Relation: Journal of physics. D, Applied physics, 42,185107
    Source URI: http://dx.doi.org/10.1088/0022-3727/42/18/185107
    Data Type: article
    DOI 連結: http://dx.doi.org/10.1088/0022-3727/42/18/185107
    DOI: 10.1088/0022-3727/42/18/185107
    Appears in Collections:[應用物理研究所 ] 期刊論文

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