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Picosecond time-resolved study of excitons in GaAs-A1As multi-quantum-well structures
Author(s) -
Yasuaki Masumoto,
Shigeo Shionoya,
Hitoshi Kawaguchi
Publication year - 1984
Publication title -
physical review. b, condensed matter
Language(s) - English
Resource type - Journals
eISSN - 1095-3795
pISSN - 0163-1829
DOI - 10.1103/physrevb.29.2324
Subject(s) - exciton , picosecond , kinetic energy , physics , atomic physics , population , biexciton , luminescence , energy (signal processing) , time domain , condensed matter physics , optics , quantum mechanics , demography , laser , sociology , computer science , computer vision
Energy- and time-resolved measurements of luminescence of 1s excitons (n=1,e-hh) in GaAs-A1As multi-quantum-well structures have been carried out for the first time in the picosecond time domain. Dynamical population changes of excitons are directly visualized in the energy-time coordinates. Results indicate that excitons lose their energy in the exciton band at a rate of 1.0×106 eV/s. This rate is much slower than the calculated kinetic-energy-loss rate and is ascribed to the random nature of the well

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