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Title: Pairing Toroidal and Magnetic Dipole Resonances in Elliptic Dielectric Rod Metasurfaces for Reconfigurable Wavefront Manipulation in Reflection

Journal Article · · Advanced Optical Materials
ORCiD logo [1];  [1];  [2];  [3];  [3];  [4]
  1. FORTH, Heraklion Crete (Greece)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  3. FORTH, Heraklion Crete (Greece); Univ. of Crete, Crete (Greece)
  4. FORTH, Heraklion Crete (Greece); Ames Lab. and Iowa State Univ., Ames, IA (United States)

Here, a novel approach for reconfigurable wavefront manipulation with gradient metasurfaces based on permittivity–modulated elliptic dielectric rods is proposed. It is shown that the required 2π phase span in the local electromagnetic response of the metasurface can be achieved by pairing the lowest magnetic dipole Mie resonance with a toroidal dipole Mie resonance, instead of using the lowest two Mie resonances corresponding to fundamental electric and magnetic dipole resonances as customarily exercised. This approach allows for the precise matching of both the resonance frequencies and quality factors. Moreover, the accurate matching is preserved if the rod permittivity is varied, allowing for constructing reconfigurable gradient metasurfaces by locally modulating the permittivity in each rod. Highly efficient tunable beam steering and beam focusing with ultrashort focal lengths are numerically demonstrated, highlighting the advantage of the low–profile metasurfaces over bulky conventional lenses. Notably, despite using a matched pair of Mie resonances, the presence of an electric polarizability background allows to perform the wavefront shaping operations in reflection, rather than transmission. This has the advantage that any control circuitry necessary in an experimental realization can be accommodated behind the metasurface without affecting the electromagnetic response.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
320081; 736876; AC02-07CH11358; DE‐AC02‐07CH11358
OSTI ID:
1482749
Alternate ID(s):
OSTI ID: 1472158; OSTI ID: 1478228
Report Number(s):
IS-J-9789
Journal Information:
Advanced Optical Materials, Vol. 6, Issue 22; ISSN 2195-1071
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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A Dynamically Modulated All‐Dielectric Metasurface Doublet for Directional Harmonic Generation and Manipulation in Transmission journal September 2019
Toroidal Dipole Resonances in All‐Dielectric Oligomer Metasurfaces journal July 2019
Toroidal metasurface resonances in microwave waveguides journal May 2019
Resolution enhancement of fluorescence microscopy using encoded patterns from all-dielectric metasurfaces journal September 2019
Controlling high- Q trapped modes in polarization-insensitive all-dielectric metasurfaces journal February 2019
Corrugated silicon metasurface optimized within the Rayleigh hypothesis for anomalous refraction at large angles journal January 2019
Ultrahigh-quality factor resonant dielectric metasurfaces based on hollow nanocuboids journal January 2019
Intelligent Metasurfaces with Continuously Tunable Local Surface Impedance for Multiple Reconfigurable Functions text January 2018
Controlling high-Q trapped modes in polarization-insensitive all-dielectric metasurfaces text January 2018
On the Calculation of the Quality Factor in Contemporary Photonic Resonant Structures text January 2019
Corrugated silicon metasurface optimized within the Rayleigh hypothesis for anomalous refraction at large angles text January 2019
Toroidal metasurface resonances in microwave waveguides journal May 2019
Scalability Analysis of Programmable Metasurfaces for Beam Steering journal January 2020
Fault Tolerance in Programmable Metasurfaces: The Beam Steering Case conference May 2019
Surface Impedance Modeling of All-Dielectric Metasurfaces journal March 2020
Workload Characterization of Programmable Metasurfaces conference September 2019
Anapole Modes in Hollow Nanocuboid Dielectric Metasurfaces for Refractometric Sensing journal December 2018
Joint Compressed Sensing and Manipulation of Wireless Emissions with Intelligent Surfaces preprint January 2019
The Software-Defined Metasurfaces Concept and Electromagnetic Aspects preprint January 2019
Error Analysis of Programmable Metasurfaces for Beam Steering text January 2020
A multi-functional reconfigurable metasurface: Electromagnetic design accounting for fabrication aspects text January 2020
High-order multipoles in all-dielectric metagrating enabling ultralarge-angle light bending with unity efficiency preprint January 2020