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

I. Favero (1) , Guillaume Cassabois (1) , A. Jankovic (1) , R. Ferreira (1) , D. Darson (1) , C. Voisin (1) , C. Delalande (1) , P. Roussignol (1) , A. Badolato , Antonio Badolato (2) , Pm Petroff (2) , Jean-Michel Gérard (3)

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

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.

Mots clés: PHOTOLUMINESCENCE; PHOTONS; GROWTH; DEVICE

Domaines: Science des matériaux [cond-mat.mtrl-sci]

I. Favero, Guillaume Cassabois, A. Jankovic, R. Ferreira, D. Darson, et al.. Giant optical anisotropy in a single InAs quantum dot in a very dilute quantum-dot ensemble. Applied Physics Letters, 2005, 86, pp.041904. ⟨10.1063/1.1854733⟩. ⟨hal-00546632⟩