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Optical anisotropy in arrow-shaped InAs quantum dots

M. Henini, S. Sanguinetti, S. C. Fortina, E. Grilli, M. Guzzi, G. Panzarini, L. C. Andreani, M. D. Upward, P. Moriarty, P. H. Beton, and L. Eaves
Phys. Rev. B 57, R6815(R) – Published 15 March 1998
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Abstract

We have observed a direct correlation between nonspherical shape and polarization anisotropy of optical transitions in quantum dots. The dots, grown by self-assembling during epitaxial deposition of InAs on GaAs(311)A, exhibit a nonconventional, faceted, arrowheadlike shape aligned in the [2¯33] direction. The dot photoluminescence emission is partially (13%) polarized along the same [2¯33] direction. The presence and the sign of the emission polarization is in agreement with the predictions of a theoretical model. Full morphological and optical characterization is reported.

  • Received 7 August 1997

DOI:https://doi.org/10.1103/PhysRevB.57.R6815

©1998 American Physical Society

Authors & Affiliations

M. Henini

  • Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom

S. Sanguinetti*, S. C. Fortina, E. Grilli, and M. Guzzi

  • Istituto Nazionale per la Fisica della Materia and Dipartimento di Scienza dei Materiali, Università degli Studi di Milano, Via Emanueli 15, I-20126 Milano, Italy

G. Panzarini and L. C. Andreani

  • Istituto Nazionale per la Fisica della Materia and Dipartimento di Fisica “A. Volta,” Università di Pavia, I-27100 Pavia, Italy

M. D. Upward, P. Moriarty, P. H. Beton, and L. Eaves

  • Department of Physics, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom

  • *Author to whom correspondence should be addressed. Electronic address: Stefano.Sanguinetti@mater.unimi.it

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Vol. 57, Iss. 12 — 15 March 1998

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