Probing the excitation spectrum of polariton condensates

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.79.125311· OSTI ID:21192559

Wouters, Michiel ^[1]; Carusotto, Iacopo ^[2]

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1. Institute of Theoretical Physics, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)
2. CNR-INFM BEC Center and Dipartimento di Fisica, Universita di Trento, I-38050 Povo (Italy)

We propose a four-wave mixing experiment to probe the elementary excitation spectrum of a nonequilibrium Bose-Einstein condensate of exciton-polaritons under nonresonant pumping. Analytical calculations based on mean-field theory show that this method is able to reveal the characteristic negative energy feature of the Bogoliubov dispersion. Numerical simulations including the finite spatial profile of the excitation laser spot and a weak disorder confirm the practical utility of the method for realistic condensates.

• OSTI ID: 21192559
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 79, Issue 12; Other Information: DOI: 10.1103/PhysRevB.79.125311; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
CONDENSATES
DISPERSIONS
EXCITATION
EXCITONS
FREQUENCY MIXING
LASER RADIATION
MEAN-FIELD THEORY
NUMERICAL ANALYSIS
POLARONS
PUMPING
SIMULATION
SPECTRA