Modulating Sub-THz Radiation with Current in Superconducting Metamaterial

V. Savinov, V. A. Fedotov, S. M. Anlage, P. A. J. de Groot, and N. I. Zheludev
Phys. Rev. Lett. 109, 243904 – Published 13 December 2012
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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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  • Received 16 June 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.243904

© 2012 American Physical Society

Authors & Affiliations

V. Savinov1,*, V. A. Fedotov1, S. M. Anlage2, P. A. J. de Groot3, and N. I. Zheludev1,4

  • 1Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, United Kingdom
  • 2Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA
  • 3School of Physics and Astronomy and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, United Kingdom
  • 4Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore

  • *vs1106@orc.soton.ac.uk

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Issue

Vol. 109, Iss. 24 — 14 December 2012

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