Design Of Broadband Anti-Reflective Metasurfaces Based On An Effective Medium Approach

Keywords

Anti-Reflection; Broadband; Effective Medium Approach; Metasurfaces; Optimization

Abstract

In this paper we show how to systematically design anti-reflective metasurfaces for the mid-infrared wavelength range. To do so, we have utilized a multilayer arrangement involving a judiciously nano-perforated surface, having air holes, arranged in a hexagonal fashion. By exploiting an effective medium approach, we optimized the dimensions of the surface features in our design. Here, we report a broadband reflectivity 3.5 - 5.5 μm that is below 10% over a broad range of incident angles 00 ≤ θi ≤ 700, irrespective of the incident polarization (TE, TM). Our experimental results are in excellent agreement with full-wave finite element simulations. This systematic approach can be used to design a wide variety of patterned metasurfaces, capable of controlling the phase of the incident optical field.

Publication Date

1-1-2017

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

10181

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2262026

Socpus ID

85021927680 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85021927680

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