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Reconfigurable directional lasing modes in cavities with generalized PT symmetry
1Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA.
Physical Review Letters
|July 12, 2014
Abstract:
We introduce a new family of generalized PT-symmetric cavities that involve gyrotropic elements and support reconfigurable unidirectional lasing modes. We derive conditions for which these modes exist and investigate a simple electronic circuit that experimentally demonstrates their feasibility in the radio-frequency domain.

