Investigations of Optical Phonon Properties in AxB1-xCyD1-y Mixed Crystals

Abstract

Abstract: In order to overcome the shortcoming involved with the current theory, the new theory model of lattice vibration in AxB1-xCyD1-y quarternary mixed crystals is described. Using the Clausius-Mossotti formula for simplifying the motion equations, and Born-Huang equations for eliminating microscopic variables, the relationship between optical phonon and elemental concentrations(x、y) of mixed crystals has been obtained. The advantage of the theory model is the optical phonon character of AxB1-xCyD1-y quarternary mixed crystals can be solved only by several parameters of the binary mixed crystals such as AC、AD、BC and BD. The parameters include TO mode frequency, LO mode frequency, static dielectric constant and optical dielectric constant. Taking the boundary values, the results are corresponding to ternary mixed crystals and binary mixed crystals. The theoretical results and the experimental datas meet well with each other, which give certain guidance to future experiments.

Key words: optoelectronics, quantum optics, optical phonon, mixed crystals, concentration, Born-Huang equations

CLC Number:

LUO Fei LIU Wei-qing LIU Yan-yong. Investigations of Optical Phonon Properties in AxB1-xCyD1-y Mixed Crystals[J]. J4, 2014, 31(2): 233-238.

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