| Exciton-polaritons in ternary mixed crystals |
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| 作者姓名： | 刘丽 梁希侠 包锦 |
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| 作者单位： | Department of Physics, Inner Mongolia University, Hohhot 010021, China;Department of Physics, Inner Mongolia University, Hohhot 010021, China;Department of Physics, Inner Mongolia University, Hohhot 010021, China |
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| 基金项目： | Project supported partly by PhD Progress Foundation
of Higher Education Institutions of China (Grant No~20040126003) and the Natural
Science Foundation of Inner Mongol of China (Grant No~200408020101). |
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| 摘 要： | In this paper the bulk exciton polaritons in ternary mixed crystals （TMCs） are investigated in the Born-Huang approximation. The numerical results of the polariton frequencies as functions of the wave-vector and the compositions for ternary mixed crystals AlxGa1-xAs, CdxZn1-xSe, and AlxGa1-xN are obtained and discussed. The new dispersion characteristics for exciton-polaritons in TMC systems are found in comparison with binary crystals. The splitting of the two branches of exciton-polariton frequencies varies nonlinearly with the composition of TMCs and has a minimum in the long-wavelength range.
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| 关 键 词： | 电震荡 三重混合晶体 激子 电磁学 |
| 收稿时间： | 2006-10-08 |
| 修稿时间： | 2006-10-08 |
Exciton--polaritons in ternary mixed crystals |
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| Liu Li,Liang Xi-Xia and Bao Jin.Exciton-polaritons in ternary mixed crystals[J].Chinese Physics B,2007,16(9):2537-2543. |
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| Authors: | Liu Li Liang Xi-Xia and Bao Jin |
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| Institution: | Department of Physics, Inner Mongolia University, Hohhot 010021, China |
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| Abstract: | In this paper the bulk exciton polaritons in ternary mixed crystals
(TMCs) are investigated in
the Born--Huang approximation. The numerical results of the polariton
frequencies as functions of the wave-vector and the compositions for ternary
mixed crystals Al$_{x$Ga$_{1 - x$As, Cd$_{x$Zn$_{1 - x$Se, and
Al$_{x$Ga$_{1 - x$N are obtained and discussed. The new dispersion
characteristics for exciton--polaritons in TMC systems are found in
comparison with binary crystals. The splitting of the two branches of
exciton--polariton frequencies varies nonlinearly with the composition of
TMCs and has a minimum in the long-wavelength range. |
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| Keywords: | polariton exciton ternary mixed crystal |
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