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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 7 — Apr. 7, 2014
  • pp: 7581–7586

Nonlocal effect on optic spectrum of a periodic dielectric-metal stack

Alejandro Paredes-Juárez, Denis A. Iakushev, Benito Flores-Desirena, Nykolay M. Makarov, and Felipe Pérez-Rodríguez  »View Author Affiliations

Optics Express, Vol. 22, Issue 7, pp. 7581-7586 (2014)

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On the basis of the formalism of the Boltzmann kinetic equation for the distribution function of the conduction electrons, the photonic band structure of binary dielectric-metal superlattice is theoretically studied. Using the constitutive nonlocal relation between the electrical current density and the electric field inside the metallic layer, the dispersion equation for photonic eigenmodes in the periodic stack is analytically expressed in terms of the surface impedances at the interfaces of the metal and dielectric layers. In the case of very thin metallic layers, the optic spectrum for the superlattice exhibits narrow pass bands as a result of the strong contrast between the impedances of the dielectric and the metal. The narrow pass bands are attributed to Fabry-Perot resonances in the relatively-thick dielectric layer. The metal nonlocality is well pronounced in the infrared and, therefore, the nonlocal effect upon the photonic band structure of the superlattice can be strong when the Fabry-Perot resonance bands are in that frequency range. Our results for the photonic spectrum have been compared with those obtained within the local Drude-Lorentz model. Noticeably differences not only in the the magnitude, but also in the sign of the real part of the Bloch wave number in the Fabry-Perot resonance bands, have been found.

© 2014 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(260.2030) Physical optics : Dispersion
(260.3060) Physical optics : Infrared
(160.3918) Materials : Metamaterials
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:

Original Manuscript: January 9, 2014
Revised Manuscript: March 13, 2014
Manuscript Accepted: March 16, 2014
Published: March 25, 2014

Alejandro Paredes-Juárez, Denis A. Iakushev, Benito Flores-Desirena, Nykolay M. Makarov, and Felipe Pérez-Rodríguez, "Nonlocal effect on optic spectrum of a periodic dielectric-metal stack," Opt. Express 22, 7581-7586 (2014)

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