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Title: All-Dielectric Heterogeneous Metasurface as an Efficient Ultra-Broadband Reflector

 [1];  [1]
  1. Ming Hsieh Department of Electrical Engineering, University of Southern California, 3737 Watt Way 90089 USA
Publication Date:
Sponsoring Org.:
OSTI Identifier:
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Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Volume: 5; Journal Issue: 14; Related Information: CHORUS Timestamp: 2017-10-20 17:42:11; Journal ID: ISSN 2195-1071
Wiley Blackwell (John Wiley & Sons)
Country of Publication:

Citation Formats

Yao, Yuhan, and Wu, Wei. All-Dielectric Heterogeneous Metasurface as an Efficient Ultra-Broadband Reflector. Germany: N. p., 2017. Web. doi:10.1002/adom.201700090.
Yao, Yuhan, & Wu, Wei. All-Dielectric Heterogeneous Metasurface as an Efficient Ultra-Broadband Reflector. Germany. doi:10.1002/adom.201700090.
Yao, Yuhan, and Wu, Wei. Tue . "All-Dielectric Heterogeneous Metasurface as an Efficient Ultra-Broadband Reflector". Germany. doi:10.1002/adom.201700090.
title = {All-Dielectric Heterogeneous Metasurface as an Efficient Ultra-Broadband Reflector},
author = {Yao, Yuhan and Wu, Wei},
abstractNote = {},
doi = {10.1002/adom.201700090},
journal = {Advanced Optical Materials},
number = 14,
volume = 5,
place = {Germany},
year = {Tue Jun 06 00:00:00 EDT 2017},
month = {Tue Jun 06 00:00:00 EDT 2017}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 6, 2018
Publisher's Accepted Manuscript

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  • Fano-resonant plasmonic metamaterials and nanostructures have become a major focus of the nanophotonics fields over the past several years due their ability to produce high quality factor (Q-factor) resonances. The origin of such resonances is the interference between a broad and narrow resonance, ultimately allowing suppression of radiative damping. However, Fano-resonant plasmonic structures still suffer non-radiative damping due to Ohmic loss, ultimately limiting the achievable Q-factors to values less than ~10. Here, we report experimental demonstration of Fano-resonant silicon-based metamaterials that have a response that mimics the electromagnetically induced transparency (EIT) found in atomic systems. Due to extremely low absorptionmore » loss, a record-high quality factor (Q-factor) of 306 was experimentally observed. Furthermore, the unit cell of the metamaterial was designed with a feed-gap which results in strong local field enhancement in the surrounding medium resulting in strong light-matter interaction. This allows the metamaterial to serve as a refractive index sensor with a figure-of-merit (FOM) of 101, far exceeding the performance of previously demonstrated localized surface plasmon resonance sensors.« less
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  • In this paper, we demonstrate a metasurface-based ultrathin flat lens operating at microwave frequencies. A series of subwavelength metallic split-ring resonators, which are sandwiched between two cross-polarized metallic gratings, are defined to obtain a radially symmetric parabolic phase distribution, covering relative phase differences ranging from 0 to 2.5π radians to create a lens. The tri-layer lens exhibits focusing/collimating of broadband microwaves from 7.0 to 10.0 GHz, with a gain enhancement of 17 dBi at a central wavelength 9.0 GHz while fed by a rectangular horn antenna. The measured focal length agrees reasonably well with design, achieving a 3 dB directionalitymore » <4.5° and confirming high-quality beam collimation along the propagation direction. Finally, the demonstrated metasurface flat lens enables light-weight, low-cost, and easily deployable flat transceivers for microwave communication, detection, and imaging applications.« less
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