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; D., Paparo; F., Miletto; SCOTTI DI UCCIO, Umberto; Marrucci, Lorenzo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 76:(2007), pp. 125115-1-125115-6. [10.1103/PhysRevB.76.125115]
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.