Polariton gap in a superconductor-dielectric superlattice

Ooi, Chong Heng Raymond and Yeung, T.C.A. (1999) Polariton gap in a superconductor-dielectric superlattice. Physics Letters A, 259 (5). pp. 413-419. ISSN 0375-9601

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Abstract

Photonic band structures explored in the past 12 years were mainly fabricated from dielectric materials, typically used in the semiconductor technology. However, we foresee novel applications and interesting possibilities by incorporating the photonic crystals concept into superconducting devices. In this paper, we study the band structure of a non-dissipative superconductor-dielectric superlattice using the two-fluid model. We apply the dispersion relations in both layers of the superlattice to the transcendental equation for a double-layer superlattice, from which we compute the bandgap structure for the dielectric-superconducting superlattice. Computation results show the existence of dispersion-curve splitting similar to the phonon-polariton case in addition to the low-frequency gap similar to the plasma-frequency gap. The polariton gap size is characterized by polarization and the penetration depth, and highly dependent on temperature at the vicinity of superconducting transition temperature. Our analysis shows that the properties of this material structure may have application in optical region if extremely low relaxation time superconductor is used. This may be an asset for superconducting electronics-photonics integration. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Photonic band structures; Systems
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 09 Jul 2013 03:53
Last Modified: 09 Oct 2019 00:44
URI: http://eprints.um.edu.my/id/eprint/7920

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