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Henri Benisty, Aloyse Degiron, Anatole Lupu, André De Lustrac, Sébastien Chénais, Sébastien Forget, Mondher Besbes, Grégory Barbillon, Aurélien Bruyant, Sylvain Blaize, and Gilles Lérondel, "Implementation of PT symmetric devices using plasmonics: principle and applications," Opt. Express 19, 18004-18019 (2011)