Layered superconductors as negative-refractive-index metamaterials

A. L. Rakhmanov, V. A. Yampol’skii, J. A. Fan, Federico Capasso, and Franco Nori
Phys. Rev. B 81, 075101 – Published 1 February 2010


We analyze the use of layered superconductors as strongly anisotropic metamaterials, which can possess negative-refractive-index in a wide frequency range. Superconductors are of particular interest because they have the potential to support low losses, which is critical for applications such as super-resolution imaging. We show that low-Tc (s-wave) superconductors can be used to construct layered heterostructures with low losses for TTc. However, the real part of their in-plane effective permittivity is very large, making coupling into the structure difficult. Moreover, even at low temperatures, layered high-Tc superconductors have a large in-plane normal conductivity, producing large losses (due to d-wave symmetry). Therefore, it is difficult to enhance the evanescent modes in either low-Tc or high-Tc superconductors.

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  • Received 21 December 2009


©2010 American Physical Society

Authors & Affiliations

A. L. Rakhmanov1,2, V. A. Yampol’skii1,3, J. A. Fan4, Federico Capasso4, and Franco Nori1,5

  • 1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan
  • 2Institute for Theoretical and Applied Electrodynamics, Russian Academy of Science, 125412 Moscow, Russia
  • 3A. Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Science, 61085 Kharkov, Ukraine
  • 4School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
  • 5Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA

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Vol. 81, Iss. 7 — 15 February 2010

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