Optical absorption coefficient of a hydrogenic impurity in a surface quantum well

被引：0

作者：

Ramyapriya, S. ^{[1
,2
]}

Arulmozhi, M. ^{[1
,2
]}

Hahn, R. V. H. ^{[3
]}

Duque, C. A. ^{[4
]}

Mora-Ramos, M. E. ^{[5
]}

机构：

[1] Jayaraj Annapackiam Coll Women Autonomous, Res Ctr Phys, Periyakulam 625601, India

[2] Mother Teresa Womens Univ, Kodaikanal 624101, Tamil Nadu, India

[3] Univ Granada, Fac Ciencias, Dept Elect & Tecnol Comp, Granada, Spain

[4] Univ Antioquia UdeA, Fac Ciencias Exactas & Nat, Grp Mat Condensada UdeA, Inst Fis, Calle 70 52-21, Medellin, Colombia

[5] Univ Autonoma Estado Morelos, Ctr Invest Ciencias, Ave Univ 1001, Cuernavaca 62209, Morelos, Mexico

来源：

PHYSICA B-CONDENSED MATTER | 2024年 / 695卷

关键词：

Optical absorption coefficient; Surface quantum well; Hydrogenic impurity; Al concentration; Well width; Photon energy; REFRACTIVE-INDEX CHANGES; HYDROSTATIC-PRESSURE; EXCITON; DOT;

D O I：

10.1016/j.physb.2024.416571

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this study, the first excited state binding energy and the linear, non-linear and total optical absorption coefficients (OAC) of a hydrogenic impurity in a surface quantum well (SQW) of the type vacuum/GaAs/AlxGa1-xAs are calculated as functions of the incident photon energy, the Al content and the well width using a variational method within the effective mass approximation. The results show that the first excited state energy and the linear, non-linear and total OAC are strongly influenced by variations in the well width, and only a slight, yet interesting, impact of the Al content is observed. A redshift in the extreme values of the linear, non-linear and total OAC is found for a SQW with fixed Al content and variable width, whereas no significant variation is observed in the reciprocal system of fixed width and variable Al content.

引用

页数：6

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