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Optical properties in complex-structured nanometric quantum wells: Photoluminescence, photoluminescence excitation, and Stokes shift

J. Appl. Phys. 106, 083521 (2009); doi:10.1063/1.3245385

Published 28 October 2009

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A. A. P. Silva,1 Áurea. R. Vasconcellos,2 Roberto Luzzi,2 E. A. Meneses,2 and E. Laureto3
1Departamento de Ciencias, Universidade Federal de Lavras, 37200-000 Lavras, MG, Brazil
2Department of Condensed Matter Physics, Institute of Physics “Gleb Wataghin,” University of Campinas, 13083-970 Campinas, SP, Brazil
3Departamento de Física, Universidade Estadual de Londrina (UEL), 86151-990 Londrina, PR, Brazil
Systems in which one or more directions are in the nanometric space scale exhibit significantly some peculiar phenomena and processes. We consider here the case of nanometric quantum wells with complex structure, displaying fractal-like characteristics, which are part of semiconductor heterostructures. An extensive theoretical study of the optical properties of photoluminescence and excited photoluminescence, and then involving absorption and the question of emergence of the so-called Stokes shift that is observed in some cases are performed. The results are compared with some experimental data. This is of relevance for opening up the possibility to use optical measurements to perform a (nondestructive) quality control of samples grown under different methods and protocols. ©2009 American Institute of Physics
History: Received 15 May 2009; accepted 27 August 2009; published 28 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083521/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.67.De
    Optical properties of quantum wells
  • 78.55.Hx
    Photoluminescence in solid inorganic materials
  • 73.21.Fg
    Quantum wells (electron states/collective excitations)
  • 81.10.-h
    Methods of crystal growth; physics of crystal growth
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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