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Title: Extraction of inhomogeneous broadening and nonradiative losses in InAs quantum-dot lasers

We present a method to quantify inhomogeneous broadening and nonradiative losses in quantum dot lasers by comparing the gain and spontaneous emission results of a microscopic laser theory with measurements made on 1.3 μm InAs quantum-dot lasers. Calculated spontaneous-emission spectra are first matched to those measured experimentally to determine the inhomogeneous broadening in the experimental samples. This is possible because treatment of carrier scattering at the level of quantum kinetic equations provides the homogeneously broadened spectra without use of free parameters, such as the dephasing rate. We then extract the nonradiative recombination current associated with the quantum-dot active region from a comparison of measured and calculated gain versus current relations.
Authors:
 [1] ;  [2] ; ;  [2] ;  [3]
  1. Sandia National Laboratories, Albuquerque, New Mexico 87185-1086 (United States)
  2. Materials Department, University of California Santa Barbara, Santa Barbara, California 93106 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22485958
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARRIERS; EMISSION; EMISSION SPECTRA; GAIN; INDIUM ARSENIDES; KINETIC EQUATIONS; LASERS; LOSSES; QUANTUM DOTS; RECOMBINATION; SCATTERING