Electrically tunable plasmonic metasurface as a matrix of nanoantennas

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Abstract: We report the fabrication and characterization of a plasmonic metasurface comprising electrically-contacted sub-wavelength gold dipole nanoantennas, conformally coated by a thin hafnia film, an indium tin oxide layer and a backside mirror, forming metal–oxide–semiconductor (MOS) capacitors, for use as an electrically-tunable reflectarray or metasurface. By voltage biasing the nanoantennas through metallic connectors and leveraging the carrier refraction effect in the MOS capacitors, our measurements demonstrate phase control in reflection over a range of about 30°, with a constant magnitude of reflection coefficient of 0.5, and the absence of secondary lobes. Comprehensive electromagnetic and quantum carrier models of the structure are developed and are in excellent agreement with the measurements. The metasurface holds promise for use as an optical phased array.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Electrically tunable plasmonic metasurface as a matrix of nanoantennas ; volume:13 ; number:6 ; year:2024 ; pages:901-913 ; extent:13
Nanophotonics ; 13, Heft 6 (2024), 901-913 (gesamt 13)

Creator
Mayoral Astorga, Luis Angel
Shabaninezhad, Masoud
Northfield, Howard
Ntais, Spyridon
Rashid, Sabaa
Lisicka-Skrzek, Ewa
Mehrvar, Hamid
Bernier, Eric
Goodwill, Dominic
Ramunno, Lora
Berini, Pierre

DOI
10.1515/nanoph-2023-0796
URN
urn:nbn:de:101:1-2024031914564959081413
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:44 AM CEST

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Associated

  • Mayoral Astorga, Luis Angel
  • Shabaninezhad, Masoud
  • Northfield, Howard
  • Ntais, Spyridon
  • Rashid, Sabaa
  • Lisicka-Skrzek, Ewa
  • Mehrvar, Hamid
  • Bernier, Eric
  • Goodwill, Dominic
  • Ramunno, Lora
  • Berini, Pierre

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