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Type: Artigo de periódico
Title: Excitoner: Stimulated amplification and propagation of excitons' beams
Author: Vasconcellos, AR
Mesquita, MV
Luzzi, R
Abstract: A statistical-thermodynamic theory of the phenomenon of stimulated amplification of the population of excitons which lie at the bottom of their lowest-energy band is presented. The experimentally detected "packet" of excitons flowing ballistically is shown to consist of a Schrodinger-Davydov solitary wave, dressed with a cloud of incoherent excitons. Moreover, a secondary excitation by a c.w. laser beam promotes a Frohlich-Bose-Einstein-like condensation, which is responsible for the relevant phenomenon that the lifetime of the soliton is largely increased with increasing pumping power.
Country: França
Editor: E D P Sciences
Citation: Europhysics Letters. E D P Sciences, v. 49, n. 5, n. 637, n. 643, 2000.
Rights: aberto
Identifier DOI: 10.1209/epl/i2000-00198-7
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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