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Title: Influence of the technological parameters of growth on the characteristics of double tunnel-coupled InGaAs/GaAs quantum wells

A comprehensive analysis of double tunnel-coupled InGaAs/GaAs quantum well heterostructures is carried out. The real composition profiles of the structures are obtained by high-resolution transmission electron microscopy and energy-dispersive spectrometry. The resultant profiles are compared with the profile obtained by computer simulation. By solving the Schrödinger equation in combination with the Poisson equation, the energy states for quantum-confined heterostructures with initially specified and real composition profiles are calculated. The influence of a number of factors, such as the well width, barrier thickness, and the background doping level on the properties of the heterostructure is thoroughly analyzed. In this manner, the optical characteristics and their dependence on the growth technology and geometric parameters of the structures are studied. Such an approach makes it possible to refine the real geometric parameters of wells and barriers and to correct the parameters of the structure and growth technology in order to improve the optical characteristics.
Authors:
; ; ;  [1] ;  [2]
  1. Nizhni Novgorod State University (Russian Federation)
  2. Nizhni Novgorod State University, Physical Technical Research Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22470135
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 49; Journal Issue: 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CRYSTAL GROWTH; ENERGY LEVELS; GALLIUM ARSENIDES; HETEROJUNCTIONS; INDIUM ARSENIDES; POISSON EQUATION; QUANTUM WELLS; SCHROEDINGER EQUATION; TRANSMISSION ELECTRON MICROSCOPY; X-RAY SPECTROSCOPY