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Bilayer Metasurfaces for Dual- and Broadband Optical Antireflection

Journal Article · · ACS Photonics
 [1];  [2];  [2];  [3];  [4];  [5];  [2];  [2]
  1. Harbin Inst. of Technology (China). Physics Dept.
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
  4. The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, China
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Optical antireflection has long been pursued for a wide range of applications, but existing approaches encounter issues in the performance, bandwidth, and structure complexity, particularly in the long-wavelength infrared regime. Here we present the demonstration of bilayer metasurfaces that accomplish dual- and broadband optical antireflection in the terahertz and mid-infrared spectral ranges. Furthermore, by simply tailoring the structural geometry and dimensions, here we show that subwavelength metal/dielectric structures enable dramatic reduction of Fresnel reflection and significant enhancement of transmission at a substrate surface, operating either at two discrete narrow bands or over a broad bandwidth up to 28%. We also use a semianalytical interference model to interpret the obtained results, in which we find that the dispersion of the constituent structures plays a critical role in achieving the observed broadband optical antireflection.
Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1406223
Report Number(s):
LA-UR-17-23975
Journal Information:
ACS Photonics, Journal Name: ACS Photonics Journal Issue: 9 Vol. 4; ISSN 2330-4022
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

From Single‐Dimensional to Multidimensional Manipulation of Optical Waves with Metasurfaces journal February 2019
Empowered Layer Effects and Prominent Properties in Few‐Layer Metasurfaces journal March 2019
Arbitrary Manipulation of Light Intensity by Bilayer Aluminum Metasurfaces journal May 2019
A Stretchable Terahertz Parabolic‐Shaped Metamaterial journal June 2019
Invited Article: Narrowband terahertz bandpass filters employing stacked bilayer metasurface antireflection structures journal May 2018
Electrically thin metasurface for broadband transmission enhancement by manipulating the amplitude and phase of the reflection coefficients journal July 2019
Electromagnetic metasurfaces: physics and applications journal January 2019
Experimental investigation of extraordinary optical behaviors in a freestanding plasmonic cascade grating at visible frequency journal January 2018
Broadband terahertz antireflective microstructures on quartz crystal surface by CO 2 laser micro-processing journal January 2019
Electromagnetically induced transparency in terahertz complementary spiral-shape metamaterials journal January 2019

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