Influence of the confining potential on the linewidth of a quantum well

IF 3.3 3区 物理与天体物理 Q2 PHYSICS, CONDENSED MATTER
Nguyen Dinh Hien
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引用次数: 9

Abstract

In this theoretical study, we consider in detail the influence of the confining potential on the magneto-optical absorption linewidth (MOALW) of a quantum well for both intersubband and intrasubband magneto-optical transitions. The projection operator method and the profile technique are used to calculate respectively the MO-absorption power and MOALW in both the semiparabolic, parabolic, and the rectangular confining potential quantum wells. The results obtained from the present study show that (i) the MOALW as functions of the structural, material, and external parameters include the confining potential frequency, the well width, the electron density, the temperature, and the magnetic field, as well as Landau level number; (ii) the larger contribution from intrasubband transitions to electron-phonon scattering compared with intersubband transitions for both three type of above confining potentials; (iii) the dependence of the MOALW on the above parameters is found to be the strongest in case of the square confining potential quantum well while it is the weakest in case of the semiparabolic confining potential quantum well for intersubband magneto-optical transitions, however, that for the parabolic confining potential is similar to the rectangular confining potential for intrasubband magneto-optical transitions. Our present calculations accord well with previous experimental studies.

限制势对量子阱线宽的影响
在这一理论研究中,我们详细考虑了子带间和子带内磁光跃迁时,约束势对量子阱磁光吸收线宽(MOALW)的影响。利用投影算子法和剖面法分别计算了半抛物型、抛物型和矩形约束势量子阱中的mo吸收功率和MOALW。研究结果表明:(1)MOALW是结构、材料和外部参数的函数,包括围势频率、阱宽、电子密度、温度、磁场和朗道能级数;(ii)对于上述三种类型的限制势,子带内跃迁比子带间跃迁对电子-声子散射的贡献更大;(iii)对于子带间磁光跃迁,发现方形围势量子阱的MOALW对上述参数的依赖性最强,而对于半抛物型围势量子阱的MOALW对上述参数的依赖性最弱,而对于子带内磁光跃迁,抛物型围势的MOALW与矩形围势的MOALW相似。我们目前的计算与以前的实验研究很吻合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Superlattices and Microstructures
Superlattices and Microstructures 物理-物理:凝聚态物理
CiteScore
6.10
自引率
3.20%
发文量
35
审稿时长
2.8 months
期刊介绍: Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4
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