Some Perspectives in Non-Hermitian Metamaterials

Abstract:

We provide a compact review of some recent results on non-Hermitian metamaterials characterized by spatial modulation of loss and gain. First, we present a systematic synthesis procedure based on a complex-coordinate extension of the transformation-optics paradigm, which admits an insightful interpretation in conjunction with the "complex-source-point" formalism. Subsequently, we study some waveguiding phenomena that can occur in bilayers satisfying the parity-time symmetry condition in the "epsilon-near-zero" regime.

• Periodical: Advances in Science and Technology (Volume 98)
• Pages: 93-102
• DOI: https://doi.org/10.4028/www.scientific.net/AST.98.93
• Online since: October 2016
• Authors: Silvio Savoia, Giuseppe Castaldi, Vincenzo Galdi*
• Keywords: Epsilon near Zero, Non-Hermitian Metamaterials, PT-Symmetry, Transformation Optics

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