从理论上研究了电子-声子相互作用对Morse势阱中光整流效应的影响.利用微扰论的方法求解在考虑电子-声子相互作用时Morse量子阱的波函数和能级,采用密度矩阵方法和迭代法得到光整流系数,以典型的GaAs/AlGaAs Morse势阱为例进行数值计算.数值结果表明在考虑电子-声子相互作用后,获得的光整流系数比仅考虑电子情况的大15%～30%左右.并且电子-声子相互作用使光整流系数峰值向高能方向偏移.因此要得到比较精确的结果,有必要考虑电子-声子相互作用的影响.
The effects of electron-phonon interaction on the optical rectification (OR) is theoretically studied for electrons confined in Morse quantum wells.The wave functions and energy levels axe described by perturbation theory when considering the electron-phonon interaction,and analytic expression for the optical rectification is obtained by the compact density method and iterative procedure.The numerical results for typical GaAs/AlGaAs material show that the optical rectification with considering electronphonon interaction is over 15%～30% greater than the one without considering electron-phonon interaction.Furthermore,the correction of electron-phonon interaction effect on energies of the electron makes the peak shift to the aspect of the high energy.
参考文献
| [1] | Sarma Das S,Mason B A.Optical phonon interaction effects in layered semiconductor structures[J].Annals of Physics,1985,163 (1):78-119. |
| [2] | Peeters F M,Devreese J T.Scaling relations between the two-and three-dimensional polarons for static and dynamical properties[J].Phys.Rev.B,1987,36:4442-4445. |
| [3] | Hu Y G,Yin J W,Xiao J L.Average number of optical phonons of weak-coupling impurity bound magnetopolaron in a parabolic quantum dot[J].Chinese Journal of Quantum Electronics (量子电子学报),2009,26(5):636-640 (in Chinese). |
| [4] | Thilagam A,Lobe M A.Coherent state polarons in quantum wells[J].Physica E,2005,25:625-635. |
| [5] | Guo K X,et al.Polaron effects on the optical rectification in electric-field-biased parabolic quantum wells[J].J.Phys.:Condens.Matter,1995,7:6583-6589. |
| [6] | Zhang C J,et al.Polaron effects on the optical rectification in asymmetrical semi-parabolic quantum wells[J].Physica B,2007,387:276-280. |
| [7] | Kityk I V.Non-linear optical phenomena in the large-sized nanocrystallites[J].J.Non-Cryst.Solids,2001,292:184-201. |
| [8] | Ma H F,et al.Study on chirps induced by the high-order nonlinear effects in the negative refractive media[J].Chinese Journal of Quantum Electronics (量子电子学报),2009,26(3):346-351 (in Chinese). |
| [9] | Jin Y,Chen X F,Huang Z Y,et al.Optical bistability of a nonlinear microcavity[J].Chinese Journal of Quantum Electronics (量子电子学报),2009,26(5):591-595 (in Chinese). |
| [10] | Yu F M,Guo K X,et al.Optical rectification in Morse quantum well[J].Acta Sinica Quantum Optica (量子光学学报),2002,8:111-117 (in Chinese). |
| [11] | Wang R Z,Guo K X,et al.Nonlinear optical rectification in asymmetric coupled quantum wells[J].Phys.Lett.A,2009,16:795-798. |
| [12] | Nieto M M,Simmons L M.Eigenstates,coherent states,and uncertainty products for the Morse oscillator[J].Phys.Rev.A,1979,19:438-444. |
| [13] | Adachi S.GaAs,AlAs,and AlxGa1-xAs material parameters for use in research and device applications[J].J.Appl.Phys.,1985,58:r1-r29. |
| [14] | Xie H J,Chen C Y,Liang S D.Influence of different phonon modes on the exciton ground-state energy in a quantum well in an electric field[J].Phys.Rev.B,1995,60:1776-1785. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%