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Title: Linear and nonlinear optical properties of GaAs/Al{sub x}Ga{sub 1−x}As/GaAs/Al{sub y}Ga{sub 1−y}As multi-shell spherical quantum dot

In this work, the optical properties of GaAs/Al{sub x}Ga{sub 1−x}As/GaAs/Al{sub y}Ga{sub 1−y}As multi-shell quantum dot heterostructure have been studied as a function of Al doping concentrations for cases with and without a hydrogenic donor atom. It has been observed that the absorption coefficient strength and/or resonant absorption wavelength can be adjusted by changing the Al content of inner-barrier and/or outer-barrier regions. Besides, it has been shown that the donor atom has an important effect on the control of the electronic and optical properties of the structure. The results have been presented as a function of the Al contents of the inner-barrier x and outer-barrier y regions and probable physical reasons have been discussed.
Authors:
;  [1] ;  [1] ;  [2]
  1. Physics Department, Faculty of Sciences, Selcuk University, 42075 Konya (Turkey)
  2. (Turkey)
Publication Date:
OSTI Identifier:
22257789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 18; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ABSORPTION SPECTROSCOPY; CONCENTRATION RATIO; DIFFUSION BARRIERS; GALLIUM ARSENIDES; OPTICAL PROPERTIES; QUANTUM DOTS; SPHERICAL CONFIGURATION; VENTILATION BARRIERS; WAVELENGTHS; X-RAY SPECTROSCOPY