CINECA IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishWe have investigated exciton dynamics and spin relaxation in a GaAs/AlAs multiple quantum well and in tensile-strained GaAs1−xPx/Al0.35Ga0.65As quantum wells. The studies have been done by picosecond time-resolved photoluminescence spectroscopy. The strain introduced by the presence of phosphorous in the GaAs1−xPx/Al0.35Ga0.65As quantum wells modifies the subband dispersions, permitting access to new structures that include the possibility of the light-hole exciton's being the first excited state of the system. Our studies have focused on the influence of the different subband dispersions on exciton dynamics and spin relaxation. We have found that the exciton formation and the spin relaxation times decrease for the quasidegenerate heavy-hole–light-hole excitonic ground state and that the recombination time depends essentially on the character of the excitonic ground state.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Exciton dynamics and spin relaxation in unstrained and tensile-strained quantum wells | |
| Autori: | ||
| Data di pubblicazione: | 1996 | |
| Rivista: | ||
| Abstract: | We have investigated exciton dynamics and spin relaxation in a GaAs/AlAs multiple quantum well and in tensile-strained GaAs1−xPx/Al0.35Ga0.65As quantum wells. The studies have been done by picosecond time-resolved photoluminescence spectroscopy. The strain introduced by the presence of phosphorous in the GaAs1−xPx/Al0.35Ga0.65As quantum wells modifies the subband dispersions, permitting access to new structures that include the possibility of the light-hole exciton's being the first excited state of the system. Our studies have focused on the influence of the different subband dispersions on exciton dynamics and spin relaxation. We have found that the exciton formation and the spin relaxation times decrease for the quasidegenerate heavy-hole–light-hole excitonic ground state and that the recombination time depends essentially on the character of the excitonic ground state. | |
| Handle: | http://hdl.handle.net/11571/100598 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11571/100598
Copyright © 2022