Coherent perfect absorption in an all-dielectric metasurface

Weiren Zhu; Fajun Xiao; Ming Kang; Malin Premaratne

doi:10.1063/1.4944635

Coherent perfect absorption in an all-dielectric metasurface

Weiren Zhu, Fajun Xiao, Ming Kang, Malin Premaratne

Electrical and Computer Systems Engineering

Research output: Contribution to journal › Article › Research › peer-review

121 Citations (Scopus)

Abstract

We design and analyze an ultra-thin metasurface consists of mono-layer all-dielectric fishnet structure. It is demonstrated that coherent perfect absorption (CPA) can be achieved in such a metasurface, and the coherent absorptivity is controllable from 0.38% to 99.85% by phase modulation. The angular selectivity of the metasurface shows the feasibility of CPA in oblique incidence circumstances, where the CPA frequency splits into two frequency bands for TE and TM polarizations. Further study reveals that while retaining CPA, the CPA frequency of the metasurface can be manipulated from 8.56 to 13.47 GHz by solely adjusting the thickness of the fishnet metasurface.

Original language	English
Article number	121901
Number of pages	5
Journal	Applied Physics Letters
Volume	108
Issue number	12
DOIs	https://doi.org/10.1063/1.4944635
Publication status	Published - 21 Mar 2016

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AB - We design and analyze an ultra-thin metasurface consists of mono-layer all-dielectric fishnet structure. It is demonstrated that coherent perfect absorption (CPA) can be achieved in such a metasurface, and the coherent absorptivity is controllable from 0.38% to 99.85% by phase modulation. The angular selectivity of the metasurface shows the feasibility of CPA in oblique incidence circumstances, where the CPA frequency splits into two frequency bands for TE and TM polarizations. Further study reveals that while retaining CPA, the CPA frequency of the metasurface can be manipulated from 8.56 to 13.47 GHz by solely adjusting the thickness of the fishnet metasurface.

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Coherent perfect absorption in an all-dielectric metasurface

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