Title :
Dephasing of the LH-HH exciton Raman coherence in GaAs quantum wells: distinguishing between phonon and carrier scattering
Author :
VanEngen Spivey, Amelia G. ; Borca, Camelia N. ; Cundiff, Steven T.
Author_Institution :
Joint Inst. for Lab. Astrophys., Colorado Univ., Boulder, CO, USA
Abstract :
Three-beam four-wave mixing shows anti-correlated scattering of HH and LH excitons in GaAs/AlGaAs quantum wells, suggesting that exciton-phonon scattering dominates the exciton dephasing. The correlation increases at higher excitation densities.
Keywords :
Raman spectra; high-speed optical techniques; laser beams; multiwave mixing; phonons; semiconductor quantum wells; transport processes; GaAs-AlGaAs; LH-HH exciton dephasing; Raman coherence; anticorrelated scattering; carrier scattering; excitation density; exciton-phonon scattering; phonon scattering; quantum well; three-beam four-wave mixing; Delay; Excitons; Four-wave mixing; Gallium arsenide; Light scattering; Nonlinear optics; Optical scattering; Particle scattering; Phonons; Raman scattering;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2005. QELS '05
Print_ISBN :
1-55752-796-2
DOI :
10.1109/QELS.2005.1549327
