| 液相外延GaAs_（1-x）_P_x_混晶的光学声子，等离子体激元和LO声子-等离子激元耦合模 |
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| 引用本文： | 陆卫,叶红娟,陶凤翔,沈学础,方志烈,劳浦东.液相外延GaAs_（1-x）_P_x_混晶的光学声子，等离子体激元和LO声子-等离子激元耦合模[J].物理学报,1987,36(8):965-973. |
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| 作者姓名： | 陆卫 叶红娟 陶凤翔 沈学础 方志烈 劳浦东 |
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| 作者单位： | 中国科学院上海技术物理研究所红外物理开放实验室；复旦大学 |
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| 摘 要： | 在40--7 0 0 (1/cm)波数和4.2--300 K 温度范围内研究了不同组份液相外延n 型GaAs_（1-x）_P_x__样品的红外反射谱. 对反射谱进行了鹰谐振子拟合与K-K 关系计算.从而获得了有关描述GaAs_（1-x）_P_x__样品的光学声子模、等离子体激元、LO 声子-等离子体激元藕合模的重要物理参量及红外光学常数信息. 基于这些计算结果, 提出了双导带谷并计及与x 能谷相联系的施主能级模型, 用它解释等离子体激元频率和实验观察的三支主要的祸合模的温度变化规律。
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THE OPTICAL PHONONS,,PLASMON AND LO PHONON-PLASMON COUPLING MODE IN MIXED CRYSTAL GaAs_（1-x）_P_x_ ROWN BY LIQUID PHASE EPITAXY |
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| Lu Wei,Ye Hong-juan,Tao Feng-xiang,Shen Xue-chu,Fang Zhi-lie,Lao Pu-dong.THE OPTICAL PHONONS,,PLASMON AND LO PHONON-PLASMON COUPLING MODE IN MIXED CRYSTAL GaAs_（1-x）_P_x_ ROWN BY LIQUID PHASE EPITAXY[J].Acta Physica Sinica,1987,36(8):965-973. |
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| Authors: | Lu Wei Ye Hong-juan Tao Feng-xiang Shen Xue-chu Fang Zhi-lie Lao Pu-dong |
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| Abstract: | The far infrared reflection spectra of n GaAs_(1-x)_P_x_ with x=0.328 and x=0.40 are investigated in the frequency range of 40-700 1/cm and the temperature range of 4.2-300K. The important physical parameters describing the optical phonons, Plasmon and LO phononplasmon coupling mode of the material and infrared optical constants are obtained by the multioscillator fitting and K-K relation calculation. A model of two conduction band valley with a donor level below and associated with X minimum is present to explain the behavior of the dependence of plasmon frequency temperature on temperature and the variation of the three coupling modes with temperature.
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