We investigated the nanosecond-scale time decay of the blue-green light emitted by nominally pure SrTiO3 following the absorption of an intense picosecond laser pulse generating a high density of electron-hole pairs. Two independent components are identified in the fluorescence signal that show a different dynamics with varying excitation intensity and which can be modeled as a bimolecular and unimolecolar process. An inter- pretation of the observed recombination kinetics in terms of interacting electron and hole polarons is proposed.

Recombination kinetics of a dense electron-hole plasma in strontium titanate

RUBANO, ANDREA;SCOTTI DI UCCIO, UMBERTO;MARRUCCI, LORENZO
2007

Abstract

We investigated the nanosecond-scale time decay of the blue-green light emitted by nominally pure SrTiO3 following the absorption of an intense picosecond laser pulse generating a high density of electron-hole pairs. Two independent components are identified in the fluorescence signal that show a different dynamics with varying excitation intensity and which can be modeled as a bimolecular and unimolecolar process. An inter- pretation of the observed recombination kinetics in terms of interacting electron and hole polarons is proposed.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/107020
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