Quantum beats of free and bound excitons in GaN

Citation
K. Kyhm et al., Quantum beats of free and bound excitons in GaN, APPL PHYS L, 79(8), 2001, pp. 1097-1099
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
79
Issue
8
Year of publication
2001
Pages
1097 - 1099
Database
ISI
SICI code
0003-6951(20010820)79:8<1097:QBOFAB>2.0.ZU;2-S
Abstract
We present spectrally resolved and time-integrated four-wave mixing measure ments at coherent dynamics of bound excitons in a high-quality GaN epilayer . Coherent excitation, with co-circular polarized light, of the neutral don or-bound excitons (D X-0) and A excitons (X-A) results in quantum beats, co rresponding to the energy splitting between D X-0 and X-A. The temperature- dependent dephasing rate is used to deduce the strength of the D X-0-acoust ic-phonon interaction via the homogeneous linewidth. (C) 2001 American Inst itute of Physics.