UNICA IRIS Institutional Research Information System
IRIS è il sistema di gestione integrata dei dati della ricerca (persone, progetti, pubblicazioni, attività) adottato dall'Università degli Studi di Cagliari dal mese di luglio 2015.
EnglishWe demonstrate a novel all-optical quantum well light modulator device. The device is all-optical in the sense that one “control” laser beam modulates a “read” beam without the use of an external bias. It exploits the large built-in piezoelectric fields present in strained semiconductor layers grown along a polar axis. The new concept here is the use of piezoelectric barriers as opposed to wells. This enables efficient spatial separation of photocarriers created by the “control” beam. We present room-temperature results showing that an optical “control” power of 70 W/cm2 creates in the heart of the structure a space-charge field of about 30 kV/cm, inducing large spectral shifts in the photoluminescence spectra of a CdHgTe quantum well in the mid-IR spectral region.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | II-VI piezoelectric-barrier heterostructure for infrared light modulation | |
| Autori: | ||
| Data di pubblicazione: | 1998 | |
| Rivista: | ||
| Abstract: | We demonstrate a novel all-optical quantum well light modulator device. The device is all-optical in the sense that one “control” laser beam modulates a “read” beam without the use of an external bias. It exploits the large built-in piezoelectric fields present in strained semiconductor layers grown along a polar axis. The new concept here is the use of piezoelectric barriers as opposed to wells. This enables efficient spatial separation of photocarriers created by the “control” beam. We present room-temperature results showing that an optical “control” power of 70 W/cm2 creates in the heart of the structure a space-charge field of about 30 kV/cm, inducing large spectral shifts in the photoluminescence spectra of a CdHgTe quantum well in the mid-IR spectral region. | |
| Handle: | http://hdl.handle.net/11584/5924 | |
| Tipologia: | 1.1 Articolo in rivista |
File in questo prodotto:
Copyright © 2021