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PT Metamaterials via Complex-Coordinate Transformation Optics

Giuseppe Castaldi, Silvio Savoia, Vincenzo Galdi, Andrea Alù, and Nader Engheta
Phys. Rev. Lett. 110, 173901 – Published 23 April 2013
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Abstract

We extend the transformation-optics paradigm to a complex spatial coordinate domain, in order to deal with electromagnetic metamaterials characterized by balanced loss and gain, giving special emphasis to parity-time (PT) symmetric metamaterials. We apply this general theory to complex-source-point radiation and anisotropic transmission resonances, illustrating the capability and potentials of our approach in terms of systematic design, analytical modeling, and physical insights into complex-coordinate wave objects and resonant states.

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  • Received 29 October 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.173901

© 2013 American Physical Society

Authors & Affiliations

Giuseppe Castaldi1, Silvio Savoia1, Vincenzo Galdi1,*, Andrea Alù2, and Nader Engheta3

  • 1Waves Group, Department of Engineering, University of Sannio, I-82100 Benevento, Italy
  • 2Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
  • 3Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

  • *vgaldi@unisannio.it

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Issue

Vol. 110, Iss. 17 — 26 April 2013

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