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Electro-optical modulation of sub-terahertz radiation in a superconducting metamaterial

Electro-optical modulation of sub-terahertz radiation in a superconducting metamaterial
Electro-optical modulation of sub-terahertz radiation in a superconducting metamaterial
We report the first demonstration of electro-optical modulation of millimetre-wave radiation using a superconductor metamaterial. High-contrast intensity and phase modulation is achieved via the distraction of the superconducting state by current running through the metal network of niobium metamaterial.
The asymmetrically split-ring niobium metamaterial at temperatures below Tc supports a Fano-type mode of excitation associated with high-quality resonances (Q~130) in its transmission and absorption spectra. Current up to 700mA running through the niobium network of metamolecules is sufficient to induce a phase transition in the superconductor which is accompanied by an increase of the Joule losses and a degradation of the Fano resonance. A nearly 100% modulation of the metamaterial's transmission and reflection at the resonance frequency of about ~100GHz has been demonstrated. We also demonstrated a 500kHz amplitude modulation of the sub-terahertz carrier signal and believe that the modulation rate can be improved further.
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Savinov, V., Fedotov, V.A., de Groot, P.A.J. and Zheludev, N.I. (2012) Electro-optical modulation of sub-terahertz radiation in a superconducting metamaterial. SPIE Photonics Europe 2012, Belgium. 16 - 19 Apr 2012.

Record type: Conference or Workshop Item (Poster)

Abstract

We report the first demonstration of electro-optical modulation of millimetre-wave radiation using a superconductor metamaterial. High-contrast intensity and phase modulation is achieved via the distraction of the superconducting state by current running through the metal network of niobium metamaterial.
The asymmetrically split-ring niobium metamaterial at temperatures below Tc supports a Fano-type mode of excitation associated with high-quality resonances (Q~130) in its transmission and absorption spectra. Current up to 700mA running through the niobium network of metamolecules is sufficient to induce a phase transition in the superconductor which is accompanied by an increase of the Joule losses and a degradation of the Fano resonance. A nearly 100% modulation of the metamaterial's transmission and reflection at the resonance frequency of about ~100GHz has been demonstrated. We also demonstrated a 500kHz amplitude modulation of the sub-terahertz carrier signal and believe that the modulation rate can be improved further.

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More information

e-pub ahead of print date: 2012
Additional Information: 8423-75
Venue - Dates: SPIE Photonics Europe 2012, Belgium, 2012-04-16 - 2012-04-19
Organisations: Optoelectronics Research Centre, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 376456
URI: https://eprints.soton.ac.uk/id/eprint/376456
PURE UUID: aab10c8c-0314-4a01-8314-efb6ace49fd0
ORCID for V. Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 23 Apr 2015 16:00
Last modified: 30 Jul 2019 00:39

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Contributors

Author: V. Savinov ORCID iD
Author: V.A. Fedotov
Author: P.A.J. de Groot
Author: N.I. Zheludev ORCID iD

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