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Colloquium: Superfluids of light

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David Snoke, University of Pittsburgh
14 September 2017 from 4:00 PM to 5:00 PM
117 Osmond Laboratory
Contact Name
Chris Giebink
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Polaritons in microcavities can be viewed as dressed photons— light interacts with electronic states in a solid in such a way that the photons have an effective mass and repulsive interactions. Because they are bosons, they can undergo Bose-Einstein condensation at low temperature and become superfluid. It is now routine to make polariton condensates, including in thermal equilibrium, with demonstrations of such canonical effects as quantized vortices, Josephson oscillations, and phase locking of two condensates. We can also now easily see transport of polariton condensates over long distances of hundreds of microns, allowing the possibility of polaritonic circuits. I will present recent work on flow of polariton condensates in one-dimensional channels and circular rings, and discuss recent work on interaction of electrical current with polariton condensates.