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Title: Enhanced optical property in quaternary GaInAsSb/AlGaAsSb quantum wells

High quality GaInAsSb/AlGaAsSb quantum wells (QWs) have been grown by molecular beam epitaxy using proper interface treatments. By controlling the group-V elements at interfaces, we obtained excellent optical quality QWs, which were free from undesired localized trap states, which may otherwise severely affect the exciton recombination. Strong and highly efficient exciton emissions up to room temperature with a wavelength of 2.2 μm were observed. A comprehensive investigation on the QW quality was carried out using temperature dependent and power dependent photoluminescence (PL) measurements. The PL emission intensity remains nearly constant at low temperatures and is free from the PL quenching from the defect induced localized states. The temperature dependent emission energy had a bulk-like behavior, indicating high quality well/barrier interfaces. Because of the uniformity of the QWs and smooth interfaces, the low temperature limit of inhomogeneous line width broadening is as small as 5 meV.
Authors:
;  [1]
  1. Department of Electronics Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan (China)
Publication Date:
OSTI Identifier:
22305816
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM COMPOUNDS; ANTIMONY COMPOUNDS; ARSENIC COMPOUNDS; CRYSTAL DEFECTS; DIFFUSION BARRIERS; GALLIUM COMPOUNDS; INDIUM COMPOUNDS; INTERFACES; LINE WIDTHS; MOLECULAR BEAM EPITAXY; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; QUANTUM WELLS; QUATERNARY ALLOY SYSTEMS; QUENCHING; RECOMBINATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; TRAPS; WAVELENGTHS