Imaging spectroscopy of two-dimensional excitons in a narrow GaAs/AlGaAs quantum well

Authors
Wu, Q Grober, RD Gammon, D Katzer, DS
Citation
Q. Wu et al., Imaging spectroscopy of two-dimensional excitons in a narrow GaAs/AlGaAs quantum well, PHYS REV L, 83(13), 1999, pp. 2652-2655
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
13
Year of publication
1999
Pages
2652 - 2655
Database
ISI
SICI code
0031-9007(19990927)83:13<2652:ISOTEI>2.0.ZU;2-6
Abstract
We report the observation of a sharp absorption line in the photoluminescen ce excitation spectra of individual naturally occurring quantum dots in a n arrow (2.8 nm) GaAs/Al0.3Ga0.7As quantum well that is remarkably constant t hroughout the sample. We propose that it is identified as the delocalized t wo-dimensional exciton. This assignment is confirmed by photoluminescence a nd photoluminescence excitation diffusion experiments.