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

Ivan Favero (1) , Guillaume Cassabois (1) , Aleksander Jankovic (1) , Robson Ferreira (1) , David Darson (1) , Christophe Voisin (1) , Claude Delalande (1) , Philippe Roussignol (1) , A. Badolato (2) , P. M. Petroff (2) , J. M. Gérard (3)

1 LPA - Laboratoire Pierre Aigrain
2 Materials Department and Electrical and Computer Engineering Department
3 NPSC - Nanophysique et Semiconducteurs

We present the 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.

Mots clés: quantum dot; polarization; anisotropy

Domaines: Autre [cond-mat.other]

Ivan Favero, Guillaume Cassabois, Aleksander Jankovic, Robson Ferreira, David Darson, et al.. Giant optical anisotropy in a single InAs quantum dot in a very dilute quantum-dot ensemble. 2004. ⟨hal-00003323⟩