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Optical manipulation of polariton condensates in microcavity ridges

 

19/04/2013, Luis Viña, (Depto. Física de Materiales, Universidad Autónoma de Madrid, Spain)

The use of polariton condensates in all optical logic devices has been the subject of intense research in recent years, promising ultrafast switching times, low losses, spin information transport and low power consumption.
 In this talk we shall discuss the realization of novel switches mediated by propagating Bose-Einstein exciton-polariton condensate bullets in a quasi-1D semiconductor microcavity.
 The combination of two 2 ps-long light pulses optically controls the switch response.The system dynamics is fully studied both in momentum and real space, and at different emission energies, obtaining a complete account of the velocities and positions of the polariton bullets as well as of their energy relaxation.
 Finally, coherent interference phenomena between polariton bullets, in real and momentum spaces, will be discussed.