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Metasurface-based optical liquid crystal cell as an ultrathin spatial phase modulator for THz applications

Metasurface-based optical liquid crystal cell as an ultrathin spatial phase modulator for THz applications
Metasurface-based optical liquid crystal cell as an ultrathin spatial phase modulator for THz applications

A concept of an efficient ultrathin spatial phase modulator for correcting terahertz wavefronts in transmission with subwavelength spatial resolution is experimentally demonstrated. It exploits a combination of spatially addressable resonant planar metamaterials (so-called metasurfaces) and an optically thin (<0.04λ) low-voltage (<20 V) liquid crystal cell. The device allows "imprinting"of a 2D phase profile of any spatial complexity with a spatial resolution better than 0.23λ and can be readily fabricated using the well-established LC-device technology and high-resolution photolithography technique.

hybrid metamaterials, liquid crystal devices, planar metamaterials, spatial light modulators, terahertz
2330-4022
3199–3206
Buchnev, Oleksandr
60cdb0d2-3388-47be-a066-61b3b396f69d
Podoliak, Nina
0908b951-00a7-48a5-bc82-631640910b9c
Kaltenecker, Korbinian
47d7c41e-5fd8-43b1-9234-b7f98792aa41
Walther, Markus
7fa1a6aa-41de-42cf-a06c-f4a2c7c264c9
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Buchnev, Oleksandr
60cdb0d2-3388-47be-a066-61b3b396f69d
Podoliak, Nina
0908b951-00a7-48a5-bc82-631640910b9c
Kaltenecker, Korbinian
47d7c41e-5fd8-43b1-9234-b7f98792aa41
Walther, Markus
7fa1a6aa-41de-42cf-a06c-f4a2c7c264c9
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25

Buchnev, Oleksandr, Podoliak, Nina, Kaltenecker, Korbinian, Walther, Markus and Fedotov, Vassili (2020) Metasurface-based optical liquid crystal cell as an ultrathin spatial phase modulator for THz applications. ACS Photonics, 7 (11), 3199–3206. (doi:10.1021/acsphotonics.0c01263).

Record type: Article

Abstract

A concept of an efficient ultrathin spatial phase modulator for correcting terahertz wavefronts in transmission with subwavelength spatial resolution is experimentally demonstrated. It exploits a combination of spatially addressable resonant planar metamaterials (so-called metasurfaces) and an optically thin (<0.04λ) low-voltage (<20 V) liquid crystal cell. The device allows "imprinting"of a 2D phase profile of any spatial complexity with a spatial resolution better than 0.23λ and can be readily fabricated using the well-established LC-device technology and high-resolution photolithography technique.

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Accepted/In Press date: 2020
e-pub ahead of print date: 9 November 2020
Published date: 18 November 2020
Additional Information: Funding Information: This work is supported by the Royal Society through Grant IE130472 and by the U.K.’s Engineering and Physical Sciences Research Council (EPSRC) through an extension of Career Acceleration Fellowship EP/G00515X/1. Following a period of embargo, the data from this paper can be obtained from the University of Southampton repository at https://doi.org/10.5258/SOTON/D1620 . Publisher Copyright: © 2020 American Chemical Society.
Keywords: hybrid metamaterials, liquid crystal devices, planar metamaterials, spatial light modulators, terahertz

Identifiers

Local EPrints ID: 444960
URI: http://eprints.soton.ac.uk/id/eprint/444960
ISSN: 2330-4022
PURE UUID: b85e6d7c-8e81-4557-ad11-d517e9e68452
ORCID for Nina Podoliak: ORCID iD orcid.org/0000-0002-3146-0355

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Date deposited: 13 Nov 2020 17:30
Last modified: 09 Nov 2022 05:03

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Contributors

Author: Oleksandr Buchnev
Author: Nina Podoliak ORCID iD
Author: Korbinian Kaltenecker
Author: Markus Walther
Author: Vassili Fedotov

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