2009/09/04 by A. T. Hammack, L. V. Butov, J. Wilkes +4 · 1 citation
Chemistry · Physics and Astronomy · #Atomic physics #Biexciton #Chemistry #Condensed matter physics #Excitation #Exciton #Kinetics #Laser #Lattice (music) #Materials science #Molecular physics #Optics #Optoelectronics #Photoluminescence #Physics #Ring (chemistry) #Ring laser #Semiconductor Quantum Structures and Devices #Spectroscopy and Laser Applications #Strong Light-Matter Interactions #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.80.155331
published as Phys. Rev. B 80, 155331 (2009) · 19 pages, 6 figures
arxiv created 2009/09/04 · openalex publication_date 2009/10/29 · arxiv updated 2010/03/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report on the kinetics of the inner ring in the exciton emission pattern. The formation time of the inner ring following the onset of the laser excitation is found to be about 30 ns. The inner ring is also found to disappear within 4 ns after the laser termination. The latter process is accompanied by a jump in the photoluminescence (PL) intensity. The spatial dependence of the PL jump indicates that the excitons outside of the region of laser excitation, including the inner ring region, are efficiently cooled to the lattice temperature even during the laser excitation. The ring formation and disappearance are explained in terms of exciton transport and cooling.