Effect of interactions on vortices in a nonequilibrium polariton condensate.
Phys Rev Lett
; 104(12): 126402, 2010 Mar 26.
Article
em En
| MEDLINE
| ID: mdl-20366553
ABSTRACT
We demonstrate the creation of vortices in a macroscopically occupied polariton state formed in a semiconductor microcavity. A weak external laser beam carrying orbital angular momentum (OAM) is used to imprint a vortex on the condensate arising from the polariton optical parametric oscillator (OPO). The vortex core radius is found to decrease with increasing pump power, and is determined by polariton-polariton interactions. As a result of OAM conservation in the parametric scattering process, the excitation consists of a vortex in the signal and a corresponding antivortex in the idler of the OPO. The experimental results are in good agreement with a theoretical model of a vortex in the polariton OPO.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Reino Unido