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

Favero, I.; Cassabois, G.; Jankovic, A.; Ferreira, R.; Darson, D.; Voisin, C.; Delalande, C.; Roussignol, Ph.; Badolato, A.; Petroff, P.M.; Gérard, J.M.
January 2005
Applied Physics Letters;1/24/2005, Vol. 86 Issue 4, p041904
Academic Journal
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.


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