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Surface Josephson Plasma Waves in Layered Superconductors above the Plasma Frequency: Evidence for a Negative Index of Refraction

V. A. Golick, D. V. Kadygrob, V. A. Yampol’skii, A. L. Rakhmanov, B. A. Ivanov, and Franco Nori
Phys. Rev. Lett. 104, 187003 – Published 7 May 2010
Physics logo See Synopsis: Superconductor optics

Abstract

We predict a new branch of surface Josephson plasma waves (SJPWs) in layered superconductors for frequencies higher than the Josephson plasma frequency. In this frequency range, the permittivity tensor components along and transverse to the layers have different signs, which is usually associated with negative refraction. However, for these frequencies, the bulk Josephson plasma waves cannot be matched with the incident and reflected waves in the vacuum, and, instead of the negative-refractive properties, abnormal surface modes appear within the frequency band expected for bulk modes. We also discuss the excitation of high-frequency SJPWs by means of the attenuated-total-reflection method.

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  • Received 19 January 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.187003

©2010 American Physical Society

Synopsis

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Superconductor optics

Published 4 June 2010

In the domain of unusual optical properties, layered superconductors could be viable materials with a negative index of refraction.

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Authors & Affiliations

V. A. Golick1, D. V. Kadygrob2, V. A. Yampol’skii1,2,3, A. L. Rakhmanov3,4, B. A. Ivanov3,5,6, and Franco Nori3,7

  • 1V. N. Karazin Kharkov National University, 61077 Kharkov, Ukraine
  • 2A. Ya. Usikov Institute for Radiophysics and Electronics, NASU, 61085 Kharkov, Ukraine
  • 3Advanced Science Institute, RIKEN, Saitama, 351-0198, Japan
  • 4Institute for Theoretical and Applied Electrodynamics, RAS, 125412 Moscow, Russia
  • 5Institute of Magnetism, NASU, 03142 Kiev, Ukraine
  • 6National T. Shevchenko University of Kiev, 03127 Kiev, Ukraine
  • 7Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

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Issue

Vol. 104, Iss. 18 — 7 May 2010

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