| Linear and Nonlinear Intersubband Optical Absorptions and Refractive Index Changes in InGaN Strained Single Quantum Wells： Strong Built-in Electric Field Effects |
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| 引用本文： | 池月萌,史俊杰.Linear and Nonlinear Intersubband Optical Absorptions and Refractive Index Changes in InGaN Strained Single Quantum Wells： Strong Built-in Electric Field Effects[J].中国物理快报,2007,24(8):2376-2379. |
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| 作者姓名： | 池月萌 史俊杰 |
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| 作者单位： | State Key Laboratory for Mesoscopic Physics, and School of Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Basic Research Programme of China under Grant No 2006CB921607 and the China-Australia Special Fund for Science and Technology. |
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| 摘 要： | Considering the strong built-in electric field （BEF） effects due to the spontaneous and piezoelectric polarizations, the intersubband optical absorptions and refractive index changes for an InxGa1-xN/AlyGa1-yN strained single quantum well are studied theoretically within the framework of the density matrix method and effective-mass approximation. The linear, third-order nonlinear and total absorption coefficients and refractive index changes are calculated as a function of the incident optical intensity and photon energy. Our results show that both the incident optical intensity and the strong BEF have great influence on the total absorptions and refractive index cllanges. The results are significant for designing some important photodetectors and the photonic crystal devices with adjustable photonic band structures.
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| 关 键 词： | 线性光学 非线性光学 吸附作用 光谱 |
| 收稿时间： | 2007-2-1 |
| 修稿时间： | 2007-02-01 |
Linear and Nonlinear Intersubband Optical Absorptions and Refractive Index Changes in InGaN Strained Single Quantum Wells: Strong Built-in |
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| CHI Yue-Meng,SHI Jun-Jie.Linear and Nonlinear Intersubband Optical Absorptions and Refractive Index Changes in InGaN Strained Single Quantum Wells: Strong Built-in[J].Chinese Physics Letters,2007,24(8):2376-2379. |
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| Authors: | CHI Yue-Meng SHI Jun-Jie |
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| Institution: | State Key Laboratory for Mesoscopic Physics, and School of Physics, Peking University, Beijing 100871 |
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| Abstract: | Considering the strong built-in electric field (BEF) effects due to the spontaneous and piezoelectric polarizations, the intersubband optical absorptions and refractive index changes for an InxGa1-xN/AlyGa1-yN strained single quantum well are studied theoretically within the framework of the density matrix method and effective-mass approximation. The linear, third-order nonlinear and total absorption coefficients and refractive indexchanges are calculated as a function of the incident optical intensity and photon energy. Our results show that both the incident optical intensity and the strong BEF have great influence on the total absorptions and refractive index changes. The results are significant for designing some important photodetectors and the photonic crystal devices with adjustable photonic band structures. |
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| Keywords: | 73 21 Fg 77 65 Ly 77 84 Bw |
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