Design of broadband anti-reflective metasurfaces based on an effective medium approach

被引：1
|
作者：
Nye, N. S. [1 ]
Swisher, A. [2 ]
Bungay, C. [4 ]
Tuenge, S. [4 ]
Mayer, T. [3 ]
Christodoulides, D. N. [1 ]
Rivero-Baleine, C. [1 ,4 ]
机构：
[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA
[2] Penn State Univ, State Coll, PA 16801 USA
[3] Virginia Tech, Blacksburg, VA 24061 USA
[4] Lockheed Martin, Orlando, FL 32819 USA
来源：
ADVANCED OPTICS FOR DEFENSE APPLICATIONS: UV THROUGH LWIR II | 2017年 / 10181卷
关键词：
Metasurfaces; Effective Medium Approach. Anti-Reflection; Broadband; Optimization; PARITY-TIME SYMMETRY; PLASMONIC METASURFACES; FILMS; LIGHT; REFLECTION; COATINGS; OPTICS;
D O I：
10.1117/12.2262026
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 mu m that is below 10% over a broad range of incident angles 0(0) <= theta(i) <= 70(0), 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.
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页数：7
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