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Title: Spectral and angular characteristics of dielectric resonator metasurface at optical frequencies

Abstract

The capability of manipulating light at subwavelength scale has fostered the applications of flat metasurfaces in various fields. Compared to metallic structure, metasurfaces made of high permittivity low-loss dielectric resonators hold the promise of high efficiency by avoiding high conductive losses of metals at optical frequencies. This letter investigates the spectral and angular characteristics of a dielectric resonator metasurface composed of periodic sub-arrays of resonators with a linearly varying phase response. The far-field response of the metasurface can be decomposed into the response of a single grating element (sub-array) and the grating arrangement response. The analysis also reveals that coupling between resonators has a non-negligible impact on the angular response. Over a wide wavelength range, the simulated and measured angular characteristics of the metasurface provide a definite illustration of how different grating diffraction orders can be selectively suppressed or enhanced through antenna sub-array design.

Authors:
 [1]; ; ;  [2]; ;  [1]; ; ; ;  [3]
  1. School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA 5005 (Australia)
  2. Department of Electrical and Electronic Engineering, The University of Bristol, Bristol, BS8 1TH (United Kingdom)
  3. Functional Materials and Microsystems Research Group, School of Electrical and Computer Engineering, RMIT University, Melbourne VIC 3001 (Australia)
Publication Date:
OSTI Identifier:
22391927
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTENNAS; DIELECTRIC MATERIALS; DIFFRACTION; DIFFRACTION GRATINGS; EFFICIENCY; PERMITTIVITY; RESONATORS; SIMULATION

Citation Formats

Zou, Longfang, Department of Electrical and Electronic Engineering, The University of Bristol, Bristol, BS8 1TH, López-García, Martin, Oulton, Ruth, Klemm, Maciej, Withayachumnankul, Withawat, Fumeaux, Christophe, Shah, Charan M., Mitchell, Arnan, Bhaskaran, Madhu, and Sriram, Sharath. Spectral and angular characteristics of dielectric resonator metasurface at optical frequencies. United States: N. p., 2014. Web. doi:10.1063/1.4901735.
Zou, Longfang, Department of Electrical and Electronic Engineering, The University of Bristol, Bristol, BS8 1TH, López-García, Martin, Oulton, Ruth, Klemm, Maciej, Withayachumnankul, Withawat, Fumeaux, Christophe, Shah, Charan M., Mitchell, Arnan, Bhaskaran, Madhu, & Sriram, Sharath. Spectral and angular characteristics of dielectric resonator metasurface at optical frequencies. United States. doi:10.1063/1.4901735.
Zou, Longfang, Department of Electrical and Electronic Engineering, The University of Bristol, Bristol, BS8 1TH, López-García, Martin, Oulton, Ruth, Klemm, Maciej, Withayachumnankul, Withawat, Fumeaux, Christophe, Shah, Charan M., Mitchell, Arnan, Bhaskaran, Madhu, and Sriram, Sharath. Mon . "Spectral and angular characteristics of dielectric resonator metasurface at optical frequencies". United States. doi:10.1063/1.4901735.
@article{osti_22391927,
title = {Spectral and angular characteristics of dielectric resonator metasurface at optical frequencies},
author = {Zou, Longfang and Department of Electrical and Electronic Engineering, The University of Bristol, Bristol, BS8 1TH and López-García, Martin and Oulton, Ruth and Klemm, Maciej and Withayachumnankul, Withawat and Fumeaux, Christophe and Shah, Charan M. and Mitchell, Arnan and Bhaskaran, Madhu and Sriram, Sharath},
abstractNote = {The capability of manipulating light at subwavelength scale has fostered the applications of flat metasurfaces in various fields. Compared to metallic structure, metasurfaces made of high permittivity low-loss dielectric resonators hold the promise of high efficiency by avoiding high conductive losses of metals at optical frequencies. This letter investigates the spectral and angular characteristics of a dielectric resonator metasurface composed of periodic sub-arrays of resonators with a linearly varying phase response. The far-field response of the metasurface can be decomposed into the response of a single grating element (sub-array) and the grating arrangement response. The analysis also reveals that coupling between resonators has a non-negligible impact on the angular response. Over a wide wavelength range, the simulated and measured angular characteristics of the metasurface provide a definite illustration of how different grating diffraction orders can be selectively suppressed or enhanced through antenna sub-array design.},
doi = {10.1063/1.4901735},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 19,
volume = 105,
place = {United States},
year = {2014},
month = {11}
}