Implementation of PT symmetric devices using plasmonics: principle and applications

Implementation of PT symmetric devices using plasmonics: principle and applications: Henri Benisty, Aloyse Degiron, Anatole Lupu, André De Lustrac, Sébastien Chénais, Sébastien Forget, Mondher Besbes, Grégory Barbillon, Aurélien Bruyant, Sylvain Blaize, Gilles Lérondel
The so-called PT symmetric devices, which feature ε(−x)=ε(x) * associated with parity-time symmetry, incorporate both gain and loss and can present a singular eigenvalue behaviour around a critical transition point. The scheme, typically based on co-directional coupled ... [Opt. Express 19, 18004-18019 (2011)]