The electronic and optical properties of InGaAs/InP and InAlAs/InP superlattices

被引：6
作者：
Ghidoni, C
Magri, R
Ossicini, S
机构：
[1] Univ Modena & Reggio Emilia, Ist Nazl Fis Mat, I-41100 Modena, Italy
[2] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy
来源：
SURFACE SCIENCE | 2001年 / 489卷 / 1-3期
关键词：
density functional calculation; quantum wells; superlattices;
D O I：
10.1016/S0039-6028(01)01128-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We study using first-principle calculations the electronic and optical properties of In0.5Ga0.5As/InP and In0.5Al0.5As/InP superlattices, where the InGaAs and InAlAs alloys are described through an appropriate ordered ternary structure. The calculated electronic properties show that the substitution of Ga with Al originate an opening of the band gap from the infrared to the near visible and a transformation of the band alignment from type I to type II. Through the analysis of the optical properties we discuss successfully the giant polarization anisotropy observed in these systems. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：59 / 71
页数：13
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