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- W2063585509 abstract "We have studied the luminescence of 1s orthoexcitons in Cu2O under both resonant and non-resonant two-photon excitation. The intensity of the luminescence was enhanced while resonantly exciting at the 1s or 2s orthoexciton levels. The direct and phonon-assisted emissions were observed over a wide range of temperatures (1.8–294 K) under two-photon resonant excitation. The phonon-assisted spectra can be well fit with a Maxwellian distribution with a fitting temperature close to the lattice temperature. The integrated intensity shows a minimum at 20 K and a maximum around 180 K. The existence of the direct emission feature enables us to deduce the temperature dependent bandgap and the orthoexciton line width directly up to relatively high temperatures. The red-shift of the orthoexciton energy and the increase of its line width as the temperature increases are interpreted as a temperature dependence of the real and imaginary parts of the exciton self energy." @default.
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- W2063585509 date "2004-11-01" @default.
- W2063585509 modified "2023-10-17" @default.
- W2063585509 title "Study of the 1s orthoexciton luminescence in Cu2O under two-photon excitation" @default.
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- W2063585509 doi "https://doi.org/10.1016/j.jlumin.2004.05.003" @default.
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