Probing the excitation spectrum of nonresonantly pumped polariton condensates

Details Probing the excitation spectrum of nonresonantly pumped polariton condensates Probing the excitation spectrum of nonresonantly pumped polariton condensates

2008-11-27

arxiv.org/abs/0811.4505v1

Physics

Condensed Matter

Other Condensed Matter

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.79.125311

We propose a four wave mixing experiment to probe the elementary excitation spectrum of a non-equilibrium Bose-Einstein condensate of exciton-polaritons under non-resonant 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.

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