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Black Metals: Optical Absorbers
Article

Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers

1
Department of Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
2
Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
3
Institute of Advanced Sciences (IAS), Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
4
Tokyo Tech World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(4), 409; https://doi.org/10.3390/mi11040409
Received: 18 March 2020 / Revised: 8 April 2020 / Accepted: 12 April 2020 / Published: 14 April 2020
(This article belongs to the Special Issue Micro/Nano-surfaces: Fabrication and Applications)
Realisation of a perfect absorber A = 1 with transmittance and reflectance T = R = 0 by a thin metasurface is one of the hot topics in recent nanophotonics prompted by energy harvesting and sensor applications ( A + R + T = 1 is the energy conservation). Here we tested the optical properties of over 400 structures of metal–insulator–metal (MIM) metasurfaces for a range of variation in thickness of insulator, diameter of a disc and intra-disc distance both experimentally and numerically. Conditions of a near perfect absorption A > 95 % with simultaneously occurring anti-reflection property ( R < 5 % ) was experimentally determined. Differences between the bulk vs. nano-thin film properties at mid-IR of the used materials can be of interest for plasmonic multi-metal alloys and high entropy metals. View Full-Text
Keywords: metasurface; mid infrared absorption; perfect absorption metasurface; mid infrared absorption; perfect absorption
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MDPI and ACS Style

To, N.; Juodkazis, S.; Nishijima, Y. Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers. Micromachines 2020, 11, 409. https://doi.org/10.3390/mi11040409

AMA Style

To N, Juodkazis S, Nishijima Y. Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers. Micromachines. 2020; 11(4):409. https://doi.org/10.3390/mi11040409

Chicago/Turabian Style

To, Naoki, Saulius Juodkazis, and Yoshiaki Nishijima. 2020. "Detailed Experiment-Theory Comparison of Mid-Infrared Metasurface Perfect Absorbers" Micromachines 11, no. 4: 409. https://doi.org/10.3390/mi11040409

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