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- W2074457411 abstract "Carrier cooling is investigated by means of time-resolved photoluminescence spectroscopy in an undoped ${mathrm{Al}}_{0.48}$${mathrm{In}}_{0.52}$As/${mathrm{Ga}}_{0.47}$${mathrm{In}}_{0.53}$As/InP heterostructure and in undoped and modulation-doped ${mathrm{Ga}}_{0.47}$${mathrm{In}}_{0.53}$As/${mathrm{Al}}_{0.48}$${mathrm{In}}_{0.52}$As multiple-quantum-well structures. The cooling dynamics of electrons and holes is analyzed by a theoretical model based on Fermi-Dirac statistics and taking into account polar-optical scattering and acoustic-deformation-potential scattering as energy-loss and Auger processes as heating mechanisms. The energy loss of holes by polar-optical scattering is close to theoretical expectations in the low-excitation regime, but is reduced by 2 orders of magnitude for high-excitation densities. This reduction is attributed to a hot phonon effect. For electrons the polar-optical energy-loss rate is strongly reduced even at low excitation densities as compared to theoretical expectations. We assume that screening of the Coulomb interaction between carriers and lattice might play a role beside the hot phonon overpopulation to explain this phenomenon." @default.
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- W2074457411 date "1989-03-15" @default.
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- W2074457411 title "Cooling of hot carriers in three- and two-dimensionalGa0.47In0.53As" @default.
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- W2074457411 doi "https://doi.org/10.1103/physrevb.39.5234" @default.
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