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Instantaneous Rayleigh scattering from excitons localized in monolayer islands

Langbein, Wolfgang Werner, Leosson, K., Jensen, J., Hvam, J. and Zimmermann, R. 2000. Instantaneous Rayleigh scattering from excitons localized in monolayer islands. Physical Review B 61 (16) , R10555-R10558. 10.1103/PhysRevB.61.R10555

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Abstract

We show that the initial dynamics of Rayleigh scattering from excitons in quantum wells can be either instantaneous or delayed, depending on the exciton ensemble studied. For excitation of the entire exciton resonance, a finite rise time given by the inverse inhomogeneous broadening of the exciton resonance is observed. Instead, when exciting only a subsystem of the exciton resonance, in our case excitons localized in quantum well regions of a specific monolayer thickness, the rise has an instantaneous component. This is due to the spatial nonuniformity of the initially excited exciton polarization, which emits radiation also into nonspecular directions.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0163-1829
Last Modified: 04 Jun 2017 08:00
URI: http://orca.cf.ac.uk/id/eprint/71569

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