Modulating sub-THz radiation with current in superconducting metamaterial
Modulating sub-THz radiation with current in superconducting metamaterial
We show that subterahertz transmission of the superconducting metamaterial, an interlinked two dimensional network of subwavelength resonators connected by a continuous superconducting wire loop, can be dynamically modulated by passing electrical current through it. We have identified the main mechanisms of modulation that correspond to the suppression of the superconductivity in the network by magnetic field and heat dissipation. Using the metamaterial fabricated from thin niobium film, we were able to demonstrate a transmission modulation depth of up to 45% and a bandwidth of at least 100 kHz. The demonstrated approach may be implemented with other superconducting materials at frequencies below the superconducting gap in the THz and subterahertz bands.
243904-[5pp]
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Anlage, S.M.
f4fca020-ea2f-4612-8aa7-3265ae16ab64
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
13 November 2012
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Anlage, S.M.
f4fca020-ea2f-4612-8aa7-3265ae16ab64
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Savinov, V., Fedotov, V.A., Anlage, S.M., de Groot, P.A.J. and Zheludev, N.I.
(2012)
Modulating sub-THz radiation with current in superconducting metamaterial.
Physical Review Letters, 109 (24), .
(doi:10.1103/PhysRevLett.109.243904).
Abstract
We show that subterahertz transmission of the superconducting metamaterial, an interlinked two dimensional network of subwavelength resonators connected by a continuous superconducting wire loop, can be dynamically modulated by passing electrical current through it. We have identified the main mechanisms of modulation that correspond to the suppression of the superconductivity in the network by magnetic field and heat dissipation. Using the metamaterial fabricated from thin niobium film, we were able to demonstrate a transmission modulation depth of up to 45% and a bandwidth of at least 100 kHz. The demonstrated approach may be implemented with other superconducting materials at frequencies below the superconducting gap in the THz and subterahertz bands.
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Published date: 13 November 2012
Organisations:
Optoelectronics Research Centre, Physics & Astronomy
Identifiers
Local EPrints ID: 350038
URI: http://eprints.soton.ac.uk/id/eprint/350038
PURE UUID: fd008be1-5fe1-431d-8a32-53153534787e
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Date deposited: 18 Mar 2013 09:59
Last modified: 15 Mar 2024 03:35
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Contributors
Author:
V. Savinov
Author:
V.A. Fedotov
Author:
S.M. Anlage
Author:
P.A.J. de Groot
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