Shadow-free multimers as extreme-performance meta-atoms

Research output: Contribution to journalArticle

Researchers

Research units

  • Iran University of Science and Technology
  • University of California at Irvine

Abstract

We generalize the concept of parity-time symmetric structures with the goal to create meta-atoms exhibiting extraordinary abilities to overcome the presumed limitations in the scattering of overall lossless particles, such as nonzero forward scattering and the equality of scattering and extinction powers for all lossless particles. Although the forward scattering amplitude and the extinction cross section of our proposed meta-atoms vanish, they scatter incident energy into other directions, with controllable directionality. These meta-atoms possess extreme electromagnetic properties not achievable for passive scatterers. As an example, we study meta-atoms consisting of two or three small dipole scatterers. We consider possible microwave realizations in the form of short dipole antennas loaded by lumped elements. The proposed meta-atom empowers extraordinary response of a shadow-free scatterer and theoretically enables most unusual material properties when used as a building block of an artificial medium.

Details

Original languageEnglish
Article number085412
JournalPhysical Review B
Volume97
Issue number8
Publication statusPublished - 8 Feb 2018
MoE publication typeA1 Journal article-refereed

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