Probing the excitation spectrum of polariton condensates

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.


Published in:
Physical Review B, 79, -
Year:
2009
Keywords:
Laboratories:




 Record created 2010-11-30, last modified 2018-03-17


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