Orbital angular momentum injection in a polariton superfluid.

T. Boulier; Q. Glorieux; E. Cancellieri; E. Giacobino; A. Bramati

doi:10.1117/12.2076013

8 February 2015 Orbital angular momentum injection in a polariton superfluid.

T. Boulier, Q. Glorieux, E. Cancellieri, E. Giacobino, A. Bramati

Proceedings Volume 9370, Quantum Sensing and Nanophotonic Devices XII; 93702R (2015) https://doi.org/10.1117/12.2076013
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We report a new method for injecting angular momentum in a polariton superfluid. Rather than stirring, such as what is done in atomic BECs, we resonantly inject a ring-shaped rotating superfluid in a planar semiconductor cavity. The resonant injection avoids any significant exciton populations and ensures a high level of control in the system. A Spatial Light Modulator is used to create a Laguerre-Gaussian laser beam that pumps the system and creates a rotating polariton population. By using a ℓ = 8 Laguerre-Gaussian mode we have studied the steady-state condition for observing the nucleation of angular momentum in freely propagating polaritons at the center. We find that, likely due to the fixed border conditions, the angular momentum in weak cavity disorder areas does not spontaneously nucleates at the center, and we observe a single ℓ = 8 vortex. For larger cavity disorder vortex-antivortex pairs can nucleate and we present numerical simulations that explain the role of this disorder to observe such a nucleation.

Citation Download Citation

T. Boulier, Q. Glorieux, E. Cancellieri, E. Giacobino, and A. Bramati "Orbital angular momentum injection in a polariton superfluid.", Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93702R (8 February 2015); https://doi.org/10.1117/12.2076013

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