Paper
11 May 2017 Design of broadband anti-reflective metasurfaces based on an effective medium approach
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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 βˆ’ 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.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
N. S. Nye, A. Swisher, C. Bungay, S. Tuenge, T. Mayer, D. N. Christodoulides, and C. Rivero-Baleine "Design of broadband anti-reflective metasurfaces based on an effective medium approach", Proc. SPIE 10181, Advanced Optics for Defense Applications: UV through LWIR II, 101810J (11 May 2017); https://doi.org/10.1117/12.2262026
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Cited by 2 scholarly publications.
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KEYWORDS
Tantalum

Polarization

Silica

Etching

Refractive index

Silicon

Antireflective coatings

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