Équipe de Recherche en Physique de l'Information Quantique


Abstract = {The energy shell structure of a single exciton confined in a self-assembled quantum dot (QD), including excited states, is studied in a regime where the direct Coulomb attraction energy is comparable to the kinetic energy of the carriers. This is achieved via magnetophotoluminescence excitation spectroscopy experiments, where a magnetic field applied perpendicular to the plane of the QD is used to reveal the angular-momentum content of energy shells. The absorption spectrum of the QDs is modeled, and comparison with experiment allows us to relate the observed transitions to interband QD bound-state transitions. The blueshift of the absorption peaks compared to the emission peaks is then interpreted in terms of many-body interactions, and we show that for a highly symmetric situation, the observed energy difference gives a direct measurement of the extra exchange energy gained upon addition of an extra exciton in the QD. {\copyright} 2008 The American Physical Society.},
Art_Number = {235313},
Author = {Awirothananon, S. and Raymond, S. and Studenikin, S. and Vachon, M. and Render, W. and Sachrajda, A. and Wu, X. and Babinski, A. and Potemski, M. and Fafard, S. and Cheng, S.J. and Korkusinski, M. and Hawrylak, P.},
Document_Type = {Article},
Journal = {Physical Review B - Condensed Matter and Materials Physics},
Number = {23},
Source = {Scopus},
Title = {Single-exciton energy shell structure in InAs/GaAs quantum dots},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-58549115990&partnerID=40&md5=ee04b5a7f73401afc454c6b643888d55},
Volume = {78},
Year = {2008},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-58549115990&partnerID=40&md5=ee04b5a7f73401afc454c6b643888d55}}