Abstract-Terahertz transverse-electric- and transverse-magnetic-polarized waves localized on graphene in photonic crystals

Yu. O. Averkov, V. M. Yakovenko, V. A. Yampol'skii, and Franco Nori
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.045415

We predict the coexistence of both transverse-electric- and transverse-magnetic-polarized localized electromagnetic waves that can propagate in the same frequency range along a graphene layer inserted in a photonic crystal. In addition, we studied the excitation of these modes by an external wave and have shown that the resonance peaks of the sample transmissivity should be observed due to the excitation of the localized waves, independently of the polarization of the exciting wave. The simplicity of the derived dispersion relations for the localized modes and the possibility to excite waves of both polarizations provide a method for measuring graphene conductivity.

DOI: http://dx.doi.org/10.1103/PhysRevB.90.045415

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Abstract-Conversion of Terahertz Wave Polarization at the Boundary of a Layered Superconductor due to the Resonance Excitation of Oblique Surface Waves

http://prl.aps.org/abstract/PRL/v109/i2/e027005
Yu. O. Averkov¹, V. M. Yakovenko¹, V. A. Yampol’skii^1,2, and Franco Nori^2,3
1A. Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine
²Advanced Science Institute, RIKEN, Saitama, 351-0198, Japan
³Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

Received 27 December 2011; published 10 July 2012

We predict a complete TM↔TE transformation of the polarization of terahertz electromagnetic waves reflected from a strongly anisotropic boundary of a layered superconductor. We consider the case when the wave is incident on the superconductor from a dielectric prism separated from the sample by a thin vacuum gap. The physical origin of the predicted phenomenon is similar to the Wood anomalies known in optics and is related to the resonance excitation of the oblique surface waves. We also discuss the dispersion relation for these waves, propagating along the boundary of the superconductor at some angle with respect to the anisotropy axis, as well as their excitation by the attenuated-total-reflection method.

© 2012 American Physical Society

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.109.027005

DOI:

10.1103/PhysRevLett.109.027005

PACS:

74.78.Fk, 42.25.Ja, 74.25.N-

Abstract-Conversion of terahertz wave polarization at the boundary of a layered superconductor due to the resonance excitation of oblique surface waves

http://prl.aps.org/accepted/L/e6070Y01Z4a1e13e25871d0952f055c2f9d920058

Yu. O. Averkov, V. M. Yakovenko, V. A. Yampol’skii, and Franco Nori

Accepted Wednesday Jun 06, 2012

We predict a complete TMTE transformation of the polarization of terahertz electromagnetic waves reflected from a strongly anisotropic boundary of a layered superconductor. We consider the case when the wave is incident on the superconductor from a dielectric prism separated from the sample by a thin vacuum gap. The physical origin of the predicted phenomenon is similar to the Wood anomalies known in optics, and is related to the resonance excitation of the oblique surface waves. We also discuss the dispersion relation for these waves, propagating along the boundary of the superconductor at some angle with respect to the anisotropy axis, as well as their excitation by the attenuated-total-reflection method.