Title

Investigation Of Excitonic Saturation By Time-Resolved Circular Dichroism In Gaas-Alxga1-Xas Multiple Quantum Wells

Abstract

Time- and wavelength-resolved circular dichroism of the excitonic saturation in GaAs-AlxGa1-xAs multiple quantum wells at room temperature is investigated using a degenerate excite-probe method. For moderate excitation, the effects of photogenerated carriers on the heavy-hole exciton resonance are separately identified as the contributions of phase-space filling and Coulombic effects (screening and line-shape broadening). These contributions are observed to be of a similar magnitude. The induced circular dichroism of the exciton saturation was observed to decay with a time constant of 50 ps, which is attributable to electron spin relaxation. © 1994 The American Physical Society.

Publication Date

1-1-1994

Publication Title

Physical Review B

Volume

49

Issue

24

Number of Pages

17160-17169

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevB.49.17160

Socpus ID

0005202457 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0005202457

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