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Artículo

Anomalous group velocity at the high energy range of a 3D photonic nanostructure

Botey, Muriel; Martorell, Jordi; Dorado, Luis AntonioIcon ; Depine, Ricardo AngelIcon ; Lozano, Gabriel; Míguez, Hernán
Fecha de publicación: 07/2010
Editorial: Optical Society of America
Revista: Optics Express
ISSN: 1094-4087
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

We report on a study of electromagnetic waves propagation in thin periodically ordered photonic nanostructures in the spectral range where the light wavelength is on the order of the lattice parameter. The vector KKR method we use allows us to determine the group index from finite photonic structures including extinction providing confirmation of recently emerged results. We show that for certain frequencies the group velocity of opal slabs can either be superluminal or approach zero depending on the crystal thickness and the unavoidable presence of losses. In some cases, group velocity can be negative. Such behavior can be clearly attributed to the finite character of the three-dimensional structure and reproduces previously reported experimental observations. Calculations show that contrary to the predictions of extraordinary group velocity reductions for infinite periodic structures, the group velocity of real opals may exhibit strong fluctuations at the high energy range. Hence, a direct identification between the calculated anomalous group velocities, for an actual opal film, and the predicted propagating low dispersion modes for an ideal infinite ordered structure seems difficult to establish. © 2010 Optical Society of America.
Palabras clave: Photonic Nanostructures , Photonic Crystals , Photonic Bandgap Materials , Nanomaterials
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/59070
URL: https://www.osapublishing.org/oe/abstract.cfm?uri=oe-18-15-15682&origin=search
DOI: http://dx.doi.org/10.1364/OE.18.015682
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Botey, Muriel; Martorell, Jordi; Dorado, Luis Antonio; Depine, Ricardo Angel; Lozano, Gabriel; et al.; Anomalous group velocity at the high energy range of a 3D photonic nanostructure; Optical Society of America; Optics Express; 18; 15; 7-2010; 15682-15690
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