Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
POLARIZATION DEPENDENCE OF 4-WAVE-MIXING SIGNALS IN QUANTUM-WELLS
Autore:
BENNHARDT D; THOMAS P; ECCLESTON R; MAYER EJ; KUHL J;
Indirizzi:
UNIV MARBURG,DEPT PHYS W-3550 MARBURG GERMANY UNIV MARBURG,CTR MAT SCI W-3550 MARBURG GERMANY MAX PLANCK INST FESTKORPERFORSCH W-7000 STUTTGART 80 GERMANY
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 20, volume: 47, anno: 1993,
pagine: 13485 - 13490
SICI:
0163-1829(1993)47:20<13485:PDO4SI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
D. Bennhardt et al., "POLARIZATION DEPENDENCE OF 4-WAVE-MIXING SIGNALS IN QUANTUM-WELLS", Physical review. B, Condensed matter, 47(20), 1993, pp. 13485-13490

Abstract

Recent transient four-wave-mixing experiments in the two-pulse photon-echo configuration performed on GaAs quantum wells have yielded the surprising result that in some samples the T2 time obtained from the polarization decay can be shorter for cross-polarized input fields than for parallel input fields. A concomitant change from photon-echo to free-induction-decay behavior has also been observed. A phenomenologicalmodel is presented which explains these observations by means of a disorder-induced coupling of the sigma+ and sigma- exciton transitions which is inhomogeneous in coupling strength. Such coupling also leads to a remarkable change in the light-hole-heavy-hole exciton quantum beat phase as a function of pulse delay for a critical relative orientation of the polarization of the incident pulses. Experimental observations of this effect are presented to support the validity of the model.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 20:11:49