Tuesday, April 9, 2013

1304.2061 (Bo Zhang et al.)

Zero Dimensional Polariton Laser in a Sub-Wavelength Grating Based
Vertical Microcavity

Bo Zhang, Zhaorong Wang, Sebastian Brodbeck, Christian Schneider, Martin Kamp, Sven Hoefling, Hui Deng
Semiconductor microcavity exciton-polaritons have emerged as a unique, open system that exhibits manybody quantum orders without thermal equilibrium. Hallmarks of non-equilibrium condensation and superfluidity have been widely observed in 2D. Progress beyond 2D condensation physics, however, has been hindered by the limited means to confine the polaritons and to couple multiple polariton systems in conventional microcavities. Here we demonstrate the control of the dimensionality and polarization of the polaritons by design using a hybrid cavity made of a single-layer sub-wavelength grating mirror and a distributed Bragg reflector. Three-dimensional confinement of polaritons was achieved and single-mode polariton lasing was observed at a pre-defined polarization. Incorporation of a designable slab mirror into the conventional vertical cavity, when operating in the strong-coupling regime, enables confinement, control and coupling of polariton gasses in a scalable fashion. It may open a door to experimental implementation of polariton-based quantum photonic devices and coupled cavity quantum electrodynamics systems.
View original: http://arxiv.org/abs/1304.2061

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