Abstract:
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.
Registro:
Documento: |
Artículo
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Título: | Anomalous group velocity at the high energy range of a 3D photonic nanostructure |
Autor: | Botey, M.; Martorell, J.; Dorado, L.A.; Depine, R.A.; Lozano, G.; Míguez, H. |
Filiación: | Departament de Física i Enginyeria Nuclear, Universität Politécnica de Catalunya, c. Jordi Girona, 1-3, 08034 Barcelona, Spain ICFO, Lnstitut de Ciències Fotànlques, Parc Medlterrani de la Tecnologia, Av. del Canal Olímpic s/n, 08860 Castelldefels (Barcelona), Spain Grupo de Electromagnetismo Aplicado, Departamento de Fisica, Universidad de Buenos Aires, Buenos Aires, Argentina Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC), Américo Vespucio 49, 41092 Sevilla, Spain
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Palabras clave: | Electromagnetic waves; High energy physics; Nanostructures; Silicate minerals; Three dimensional; Crystal thickness; Direct identifications; Dispersion modes; Experimental observation; Group index; Group velocities; Group velocity reduction; High-energy range; Infinite periodic structure; KKR method; Lattice parameters; Light wavelengths; Opal films; Ordered structures; Photonic nanostructures; Photonic structure; Spectral range; Superluminal; Three-dimensional structure; Light velocity |
Año: | 2010
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Volumen: | 18
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Número: | 15
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Página de inicio: | 15682
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Página de fin: | 15690
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DOI: |
http://dx.doi.org/10.1364/OE.18.015682 |
Título revista: | Optics Express
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Título revista abreviado: | Opt. Express
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ISSN: | 10944087
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v18_n15_p15682_Botey |
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Citas:
---------- APA ----------
Botey, M., Martorell, J., Dorado, L.A., Depine, R.A., Lozano, G. & Míguez, H.
(2010)
. Anomalous group velocity at the high energy range of a 3D photonic nanostructure. Optics Express, 18(15), 15682-15690.
http://dx.doi.org/10.1364/OE.18.015682---------- CHICAGO ----------
Botey, M., Martorell, J., Dorado, L.A., Depine, R.A., Lozano, G., Míguez, H.
"Anomalous group velocity at the high energy range of a 3D photonic nanostructure"
. Optics Express 18, no. 15
(2010) : 15682-15690.
http://dx.doi.org/10.1364/OE.18.015682---------- MLA ----------
Botey, M., Martorell, J., Dorado, L.A., Depine, R.A., Lozano, G., Míguez, H.
"Anomalous group velocity at the high energy range of a 3D photonic nanostructure"
. Optics Express, vol. 18, no. 15, 2010, pp. 15682-15690.
http://dx.doi.org/10.1364/OE.18.015682---------- VANCOUVER ----------
Botey, M., Martorell, J., Dorado, L.A., Depine, R.A., Lozano, G., Míguez, H. Anomalous group velocity at the high energy range of a 3D photonic nanostructure. Opt. Express. 2010;18(15):15682-15690.
http://dx.doi.org/10.1364/OE.18.015682