Instantaneous Rayleigh scattering from excitons localized in monolayer islands

Wolfgang Langbein, Kristjan Leosson, Jacob Riis Jensen, Jørn Märcher Hvam, R. Zimmermann

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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.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume61
Issue number16
Pages (from-to)10555-10558
ISSN0163-1829
DOIs
Publication statusPublished - 2000

Bibliographical note

Copyright (2000) American Physical Society

Keywords

  • QUANTUM-WELL STRUCTURES
  • EMISSION

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