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Proceedings Paper

Anomalous group velocity at the high energy range of real 3D photonic nanostructures
Author(s): Muriel Botey; Jordi Martorell; Gabriel Lozano; Hernán Míguez; Luis A. Dorado; Ricardo A. Depine
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Paper Abstract

We perform a theoretical study on the group velocity for finite thin artificial opal slabs made of a reduced number of layers in the spectral range where the light wavelength is on the order of the lattice parameter. The vector KKR method including extinction allows us to evaluate the finite-size effects on light propagation in the ΓL and ΓX directions of fcc close-packed opal films made of dielectric spheres. The group is index determined from the phase delay introduced by the structure to the forwardly transmitted electric field. We show that for certain frequencies, light propagation can either be superluminal -positive or negative- or approach zero depending on the crystal size and absorption. Such anomalous behavior can be attributed to the finite character of the structure and provides confirmation of recently emerged experimental results.

Paper Details

Date Published: 13 May 2010
PDF: 10 pages
Proc. SPIE 7713, Photonic Crystal Materials and Devices IX, 77130S (13 May 2010); doi: 10.1117/12.855934
Show Author Affiliations
Muriel Botey, Univ. Politècnica de Catalunya (Spain)
Jordi Martorell, ICFO-Institut de Ciències Fotòniques (Spain)
Univ. Politècnica de Catalunya (Spain)
Gabriel Lozano, Instituto de Ciencia de Materiales de Sevilla (CSIC-US) (Spain)
Hernán Míguez, Instituto de Ciencia de Materiales de Sevilla (CSIC-US) (Spain)
Luis A. Dorado, Univ. de Buenos Aires (Argentina)
Ricardo A. Depine, Univ. de Buenos Aires (Argentina)


Published in SPIE Proceedings Vol. 7713:
Photonic Crystal Materials and Devices IX
Hernán R. Míguez; Sergei G. Romanov; Lucio Claudio Andreani; Christian Seassal, Editor(s)

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