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Theory of patch-antenna metamaterial perfect absorbers

Publication ,  Journal Article
Bowen, PT; Baron, A; Smith, DR
Published in: Physical Review A
June 27, 2016

A metasurface that absorbs waves from all directions of incidence can be achieved if the surface impedance is made to vary as a function of incidence angle in a specific manner. Here we show that a periodic array of planar nanoparticles coupled to a metal film can act as an absorbing metasurface with an angle-dependent impedance. Through a semi-analytical calculation based on coupled-mode theory, we find the perfect absorbing condition is equivalent to balancing the Ohmic and radiative losses of the nanoparticles at normal incidence. Absorption over a wide range of incidence angles can then be obtained by tailoring the scattered far-field pattern of the individual planar nanoparticles such that their radiative losses remain constant. The theory provides a means of understanding the behavior of perfect absorbing structures that have been observed experimentally or numerically, reconciling previously published theories and enabling the optimization of absorbing surfaces.

Duke Scholars

Published In

Physical Review A

DOI

EISSN

2469-9934

ISSN

2469-9926

Publication Date

June 27, 2016

Volume

93

Issue

6

Related Subject Headings

  • 51 Physical sciences
  • 49 Mathematical sciences
  • 34 Chemical sciences
 

Citation

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MLA
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Bowen, P. T., Baron, A., & Smith, D. R. (2016). Theory of patch-antenna metamaterial perfect absorbers. Physical Review A, 93(6). https://doi.org/10.1103/PhysRevA.93.063849
Bowen, P. T., A. Baron, and D. R. Smith. “Theory of patch-antenna metamaterial perfect absorbers.” Physical Review A 93, no. 6 (June 27, 2016). https://doi.org/10.1103/PhysRevA.93.063849.
Bowen PT, Baron A, Smith DR. Theory of patch-antenna metamaterial perfect absorbers. Physical Review A. 2016 Jun 27;93(6).
Bowen, P. T., et al. “Theory of patch-antenna metamaterial perfect absorbers.” Physical Review A, vol. 93, no. 6, June 2016. Scopus, doi:10.1103/PhysRevA.93.063849.
Bowen PT, Baron A, Smith DR. Theory of patch-antenna metamaterial perfect absorbers. Physical Review A. 2016 Jun 27;93(6).

Published In

Physical Review A

DOI

EISSN

2469-9934

ISSN

2469-9926

Publication Date

June 27, 2016

Volume

93

Issue

6

Related Subject Headings

  • 51 Physical sciences
  • 49 Mathematical sciences
  • 34 Chemical sciences