Pure and linear frequency-conversion temporal metasurface
Pure and linear frequency-conversion temporal metasurface
Metasurfaces are ultrathin structures which are constituted by an array of subwavelength scatterers with designable scattering responses. They have opened up unprecedented exciting opportunities for extraordinary wave engineering processes. On the other hand, frequency converters have drawn wide attention due to their vital applications in telecommunication systems, healthcare devices, radio astronomy, military radars, and biological sensing systems. Here, we show that a spurious-free and linear frequency-converter metasurface can be realized by leveraging unique properties of engineered transmissive temporal supercells. Such a metasurface is formed by time-modulated supercells, which are composed of temporal and static patch resonators and phase shifters. This represents a frequency-converter metasurface possessing large frequency-conversion ratio with controllable frequency bands and transmission magnitude. In contrast to conventional nonlinear mixers, the proposed temporal frequency converter offers a linear response. In addition, by taking advantage of the proposed surface-interconnector-phaser-surface (SIPS) architecture, a spurious-free and linear frequency conversion is achievable, where all undesired mixing products are strongly suppressed. The proposed metasurface may be digitally controlled and programmed through a field programmable gate array. This makes the spurious-free and linear frequency-converter metasurface a prominent solution for wireless and satellite telecommunication systems, as well as invisibility cloaks and radars. This study opens a way to realize more complicated and enhanced-efficiency spectrum-changing metasurfaces.
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7
June 2021
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Eleftheriades, George V.
280bbae6-32df-4af5-bcad-110f38ad72e7
Taravati, Sajjad and Eleftheriades, George V.
(2021)
Pure and linear frequency-conversion temporal metasurface.
Physical Review Applied, 15 (6), [064011].
(doi:10.1103/PhysRevApplied.15.064011).
Abstract
Metasurfaces are ultrathin structures which are constituted by an array of subwavelength scatterers with designable scattering responses. They have opened up unprecedented exciting opportunities for extraordinary wave engineering processes. On the other hand, frequency converters have drawn wide attention due to their vital applications in telecommunication systems, healthcare devices, radio astronomy, military radars, and biological sensing systems. Here, we show that a spurious-free and linear frequency-converter metasurface can be realized by leveraging unique properties of engineered transmissive temporal supercells. Such a metasurface is formed by time-modulated supercells, which are composed of temporal and static patch resonators and phase shifters. This represents a frequency-converter metasurface possessing large frequency-conversion ratio with controllable frequency bands and transmission magnitude. In contrast to conventional nonlinear mixers, the proposed temporal frequency converter offers a linear response. In addition, by taking advantage of the proposed surface-interconnector-phaser-surface (SIPS) architecture, a spurious-free and linear frequency conversion is achievable, where all undesired mixing products are strongly suppressed. The proposed metasurface may be digitally controlled and programmed through a field programmable gate array. This makes the spurious-free and linear frequency-converter metasurface a prominent solution for wireless and satellite telecommunication systems, as well as invisibility cloaks and radars. This study opens a way to realize more complicated and enhanced-efficiency spectrum-changing metasurfaces.
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Published date: June 2021
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Funding Information:
This work is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC).
Publisher Copyright:
© 2021 American Physical Society.
Identifiers
Local EPrints ID: 482768
URI: http://eprints.soton.ac.uk/id/eprint/482768
ISSN: 2331-7019
PURE UUID: 180e5519-4f99-4e1f-943b-c47a190cbb44
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Date deposited: 12 Oct 2023 16:42
Last modified: 01 May 2024 16:54
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Author:
Sajjad Taravati
Author:
George V. Eleftheriades
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