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Title: Experimental realization of a terahertz all-dielectric metasurface absorber

Abstract

Metamaterial absorbers consisting of metal, metal-dielectric, or dielectric materials have been realized across much of the electromagnetic spectrum and have demonstrated novel properties and applications. However, most absorbers utilize metals and thus are limited in applicability due to their low melting point, high Ohmic loss and high thermal conductivity. Other approaches rely on large dielectric structures and / or a supporting dielectric substrate as a loss mechanism, thereby realizing large absorption volumes. Here we present a terahertz (THz) all dielectric metasurface absorber based on hybrid dielectric waveguide resonances. We tune the metasurface geometry in order to overlap electric and magnetic dipole resonances at the same frequency, thus achieving an experimental absorption of 97.5%. A simulated dielectric metasurface achieves a total absorption coefficient enhancement factor of F T=140, with a small absorption volume. Our experimental results are well described by theory and simulations and not limited to the THz range, but may be extended to microwave, infrared and optical frequencies. In conclusion, the concept of an all-dielectric metasurface absorber offers a new route for control of the emission and absorption of electromagnetic radiation from surfaces with potential applications in energy harvesting, imaging, and sensing.

Authors:
 [1];  [1];  [2];  [1]
  1. Duke Univ., Durham, NC (United States). Dept. of Electrical and Computer Engineering
  2. Australian National Univ., Canberra, ACT (Australia). Nonlinear Physics Center
Publication Date:
Research Org.:
Duke Univ., Durham, NC (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1463694
Grant/Contract Number:  
SC0014372
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; metamaterials; far infrared or terahertz; absorption

Citation Formats

Liu, Xinyu, Fan, Kebin, Shadrivov, Ilya V., and Padilla, Willie J. Experimental realization of a terahertz all-dielectric metasurface absorber. United States: N. p., 2017. Web. doi:10.1364/OE.25.000191.
Liu, Xinyu, Fan, Kebin, Shadrivov, Ilya V., & Padilla, Willie J. Experimental realization of a terahertz all-dielectric metasurface absorber. United States. doi:10.1364/OE.25.000191.
Liu, Xinyu, Fan, Kebin, Shadrivov, Ilya V., and Padilla, Willie J. Tue . "Experimental realization of a terahertz all-dielectric metasurface absorber". United States. doi:10.1364/OE.25.000191. https://www.osti.gov/servlets/purl/1463694.
@article{osti_1463694,
title = {Experimental realization of a terahertz all-dielectric metasurface absorber},
author = {Liu, Xinyu and Fan, Kebin and Shadrivov, Ilya V. and Padilla, Willie J.},
abstractNote = {Metamaterial absorbers consisting of metal, metal-dielectric, or dielectric materials have been realized across much of the electromagnetic spectrum and have demonstrated novel properties and applications. However, most absorbers utilize metals and thus are limited in applicability due to their low melting point, high Ohmic loss and high thermal conductivity. Other approaches rely on large dielectric structures and / or a supporting dielectric substrate as a loss mechanism, thereby realizing large absorption volumes. Here we present a terahertz (THz) all dielectric metasurface absorber based on hybrid dielectric waveguide resonances. We tune the metasurface geometry in order to overlap electric and magnetic dipole resonances at the same frequency, thus achieving an experimental absorption of 97.5%. A simulated dielectric metasurface achieves a total absorption coefficient enhancement factor of FT=140, with a small absorption volume. Our experimental results are well described by theory and simulations and not limited to the THz range, but may be extended to microwave, infrared and optical frequencies. In conclusion, the concept of an all-dielectric metasurface absorber offers a new route for control of the emission and absorption of electromagnetic radiation from surfaces with potential applications in energy harvesting, imaging, and sensing.},
doi = {10.1364/OE.25.000191},
journal = {Optics Express},
issn = {1094-4087},
number = 1,
volume = 25,
place = {United States},
year = {2017},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 20 works
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    Works referencing / citing this record:

    Solar harvesting based on perfect absorbing all-dielectric nanoresonators on a mirror
    journal, January 2019

    • Vismara, Robin; Länk, Nils Odebo; Verre, Ruggero
    • Optics Express, Vol. 27, Issue 16
    • DOI: 10.1364/oe.27.00a967

    Solar harvesting based on perfect absorbing all-dielectric nanoresonators on a mirror
    journal, January 2019

    • Vismara, Robin; Länk, Nils Odebo; Verre, Ruggero
    • Optics Express, Vol. 27, Issue 16
    • DOI: 10.1364/oe.27.00a967