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Giant optical anisotropy in a single InAs quantum dot in a very dilute quantum-dot ensemble

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HAL-CEA
Keywords
  • Photoluminescence
  • Photons
  • Growth
  • Device
  • [Phys.Cond.Cm-Ms] Physics [Physics]/Condensed Matter [Cond-Mat]/Materials Science [Cond-Mat.Mtrl-Sci
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Abstract

We present experimental evidence of giant optical anisotropy in single InAs quantum dots. Polarization-resolved photoluminescence spectroscopy reveals a linear polarization ratio with huge fluctuations, from one quantum dot to another, in sign and in magnitude with absolute values up to 82%. Systematic measurements on hundreds of quantum dots coming from two different laboratories demonstrate that the giant optical anisotropy is an intrinsic feature of dilute quantum-dot arrays. (C) 2005 American Institute of Physics.

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