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Title: Spectral dependence of the linewidth enhancement factor in quantum dot lasers

The spectral analysis of amplified spontaneous emission is used to determine the linewidth enhancement factor (α-factor) in lasers based on InAs/InGaAs quantum dots (QDs) in a wide spectral range near the ground-state optical transition energy. The effect of the pump current and number of QDs on the spectral dependences of the α-factor is examined. The temperature dependence of the spectra of the α-factor is experimentally determined for the first time for lasers with InAs/InGaAs QDs. An explanation is suggested for the observed anomalous decrease in the α-factor with increasing temperature.
Authors:
 [1] ; ;  [2] ;  [1] ;  [3] ; ;  [2] ; ;  [1] ;  [2]
  1. Russian Academy of Sciences, St. Petersburg Academic University-Nanotechnology Research and Education Center (Russian Federation)
  2. Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)
  3. Innolume GmbH (Germany)
Publication Date:
OSTI Identifier:
22300415
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 47; Journal Issue: 12; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; EMISSION; GALLIUM ARSENIDES; GROUND STATES; INDIUM ARSENIDES; LASERS; QUANTUM DOTS; SPECTRA; TEMPERATURE DEPENDENCE