Title :
Differential measurements of interband and intersubband coherence and exciton-exciton correlations in quantum wells
Author :
Hawkins, S.A. ; Stevens, M.J. ; Gansen, E.J. ; Jarasiunas, K. ; Smirl, A.L. ; Steel, D.G.
Author_Institution :
Lab. for Photonics & Quantum Electron., Iowa Univ., Iowa City, IA, USA
Abstract :
A novel temporally-gated technique and standard differential detection techniques are used to study quantum beats involving the light and heavy hole excitons in GaAs quantum wells. The contributions of intravalence band coherence are separated from those of conduction-to-valence band coherence and the contributions of dynamic exciton-exciton correlations are identified by taking advantage of the polarization selection rules for the excitonic transitions.
Keywords :
III-V semiconductors; conduction bands; differential detection; excitons; gallium arsenide; semiconductor quantum wells; time resolved spectra; valence bands; GaAs; GaAs quantum wells; conduction-to-valence band coherence; differential measurements; dynamic exciton-exciton correlations; exciton-exciton correlations; excitonic transitions; heavy hole excitons; interband coherence; intersubband coherence; intravalence band coherence; light hole excitons; polarization selection rules; quantum beats; quantum wells; standard differential detection techniques; temporally-gated technique; Excitons; Frequency; Gallium arsenide; Nonlinear optics; Optical polarization; Optical pulses; Probes; Pulse amplifiers; Pulse measurements; Time measurement;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 2000. Technical Digest
Conference_Location :
Kaua´i-Lihue, HI, USA
Print_ISBN :
1-55752-646-X
DOI :
10.1109/NLO.2000.883569
