Total absorption of electromagnetic waves in ultimately thin layers

Younes Ra'Di, Viktar S. Asadchy, Sergei A. Tretyakov

Research output: Contribution to journalArticlepeer-review

121 Scopus citations

Abstract

We consider single-layer arrays of electrically small lossy particles that completely absorb electromagnetic waves at normal incidence. Required conditions for electromagnetic properties of bi-anisotropic particles have been identified in the most general case of uniaxial reciprocal and nonreciprocal particles. We consider the design possibilities offered by the particles of all four fundamental classes of bi-anisotropic inclusions: reciprocal chiral and omega particles and nonreciprocal Tellegen and moving particles. We also study the reflection/transmission properties of asymmetric structures with different properties when illuminated from the opposite sides of the sheet. It has been found that it is possible to realize single-layer grids which exhibit the total absorption property when illuminated from one side but are totally transparent when illuminated from the other side (an ultimately thin isolator). Other possible properties are co-polarized or twist polarized reflection from the side opposite to the absorbing one. Finally, we discuss possible approaches to practical realization of particles with the properties required for single-layer perfect absorbers and other proposed devices.

Original languageEnglish (US)
Article number6553200
Pages (from-to)4606-4614
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Volume61
Issue number9
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Absorber
  • Bi-anisotropic particle
  • Electromagnetic wave absorption
  • Isolator
  • Periodical structures
  • Reflection
  • Resonance
  • Transmission
  • Twist-polarizer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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