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- W2023761942 abstract "We show that excitons form with a time constant ensuremath{tau}ensuremath{le}20 ps following the creation of electron-hole pairs by subpicosecond optical excitation. The excitons are initially formed in large-wave-vector states. At low temperatures, these nonthermal excitons relax in ensuremath{approxeq}400 ps to the Kensuremath{approxeq}0 states, which couple directly to light by interaction with other excitons and acoustic phonons. This leads to a slow rise of exciton luminescence and an unusual dependence of this rise time on temperature, excitation density, and excitation energy." @default.
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- W2023761942 date "1990-10-15" @default.
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- W2023761942 title "Dynamics of exciton formation and relaxation in GaAs quantum wells" @default.
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- W2023761942 doi "https://doi.org/10.1103/physrevb.42.7434" @default.
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