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Titolo:
EXCITON RELAXATION DYNAMICS IN QUANTUM DOTS WITH STRONG CONFINEMENT
Autore:
VOLLMER M; MAYER EJ; RUHLE WW; KURTENBACH A; EBERL K;
Indirizzi:
UNIV MARBURG,FACHBEREICH PHYS,RENTHOF 5 D-35032 MARBURG GERMANY MAX PLANCK INST FESTKORPERFORSCH D-70569 STUTTGART GERMANY
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 24, volume: 54, anno: 1996,
pagine: 17292 - 17295
SICI:
0163-1829(1996)54:24<17292:ERDIQD>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY-RELAXATION; PHOTOLUMINESCENCE; MECHANISM; ISLANDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
M. Vollmer et al., "EXCITON RELAXATION DYNAMICS IN QUANTUM DOTS WITH STRONG CONFINEMENT", Physical review. B, Condensed matter, 54(24), 1996, pp. 17292-17295

Abstract

We report on the investigation of exciton relaxation, as traced by time-resolved photoluminescence, in nanoscale InP islands embedded in anIn0.48Ga0.52P matrix. Excitons are generated in excited, high-energy states. Depending on excitation energy, up to three LO-phonon replicasinto lower-energy exciton states are observed. The rise of all phononreplicas, which we attribute to the LO-phonon emission time, is faster than 10 ps, our time resolution. Their 1/e decay times, which we attribute to acoustical-phonon scattering times, vary between 20 and 50 ps with decreasing energy of the excited exciton states. The exciton ground state is populated by acoustical phonon emission in several tens of picoseconds.

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Documento generato il 27/11/20 alle ore 07:12:18