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Journal of Applied Physics / Volume 98 / Issue 5 / ELECTRONIC STRUCTURE AND TRANSPORT

J. Appl. Phys. 98, 053711 (2005); http://dx.doi.org/10.1063/1.2039999 (7 pages)

Strong optical nonlinearity in strain-induced laterally ordered In0.4Ga0.6As quantum wires on GaAs (311)A substrate

Yu. I. Mazur1, Zh. M. Wang1, G. G. Tarasov1, H. Wen1, V. Strelchuk1, D. Guzun1, M. Xiao1, G. J. Salamo1, T. D. Mishima2, Guoda D. Lian2, and M. B. Johnson2

1Physics Department, University of Arkansas, Fayetteville, Arkansas 72701
2Center for Semiconductor Physics in Nanostructures, University of Oklahoma, Norman, Oklahoma 73019

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(Received 1 February 2005; accepted 29 July 2005; published online 13 September 2005)

Strain-induced laterally ordered In0.4Ga0.6As on (311)A GaAs template quantum wires have been fabricated and identified with cross-section transmission electron microscopy technique to be of average length ∼ 1 μm, and on average width and height of 23 and 2 nm, respectively, under InGaAs coverage of six monolayers. The photoluminescence spectrum of a sample demonstrates unusually strong optical nonlinearity even at moderate excitation densities. The excitonic peak energy blueshifts by ∼ 25 meV without essential contribution of the quantum wire excited states at elevating excitation density. Strong decrease of the polarization anisotropy and increase of the energy of excitonic photoluminescence are attributed to a combined action of the phase-space filling effects and the screening of the internal piezoelectric field by free carriers.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. SAMPLES AND EXPERIMENTAL DETAILS
  3. EXPERIMENTAL RESULTS AND DISCUSSION
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

indium compounds, gallium arsenide, III-V semiconductors, semiconductor quantum wires, optical materials, nonlinear optics, semiconductor growth, transmission electron microscopy, photoluminescence, excitons, spectral line shift, excited states, light polarisation

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2039999

PUBLICATION DATA

ISSN

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

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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