Anomalous group velocity at the high energy range of real 3D photonic nanostructures

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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 ef...

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Autores principales:	Botey, M., Martorell, J., Lozano, G., Míguez, H., Dorado, L.A., Depine, R.A.
Formato:	CONF
Materias:	Fast ligth Nanomaterials Photonic bandgap materials Anomalous behavior Artificial opals Crystal size Dielectric spheres Finite size effect Group velocities High-energy range KKR method Lattice parameters Light wavelengths Number of layers Opal films Phase delay Photonic nanostructures Spectral range Superluminal Theoretical study Electric fields Energy gap Group delay Light propagation Light velocity Nanostructured materials Photonic crystals Spontaneous emission Photonic devices
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0277786X_v7713_n_p_Botey
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_0277786X_v7713_n_p_Botey
record_format	dspace
spelling	todo:paper_0277786X_v7713_n_p_Botey2023-10-03T15:16:42Z Anomalous group velocity at the high energy range of real 3D photonic nanostructures Botey, M. Martorell, J. Lozano, G. Míguez, H. Dorado, L.A. Depine, R.A. Fast ligth Nanomaterials Photonic bandgap materials Anomalous behavior Artificial opals Crystal size Dielectric spheres Fast ligth Finite size effect Group velocities High-energy range KKR method Lattice parameters Light wavelengths Nanomaterials Number of layers Opal films Phase delay Photonic bandgap materials Photonic nanostructures Spectral range Superluminal Theoretical study Electric fields Energy gap Group delay Light propagation Light velocity Nanostructured materials Photonic crystals Spontaneous emission Photonic devices 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. © 2010 Copyright SPIE - The International Society for Optical Engineering. Fil:Dorado, L.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Depine, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0277786X_v7713_n_p_Botey
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Fast ligth Nanomaterials Photonic bandgap materials Anomalous behavior Artificial opals Crystal size Dielectric spheres Fast ligth Finite size effect Group velocities High-energy range KKR method Lattice parameters Light wavelengths Nanomaterials Number of layers Opal films Phase delay Photonic bandgap materials Photonic nanostructures Spectral range Superluminal Theoretical study Electric fields Energy gap Group delay Light propagation Light velocity Nanostructured materials Photonic crystals Spontaneous emission Photonic devices
spellingShingle	Fast ligth Nanomaterials Photonic bandgap materials Anomalous behavior Artificial opals Crystal size Dielectric spheres Fast ligth Finite size effect Group velocities High-energy range KKR method Lattice parameters Light wavelengths Nanomaterials Number of layers Opal films Phase delay Photonic bandgap materials Photonic nanostructures Spectral range Superluminal Theoretical study Electric fields Energy gap Group delay Light propagation Light velocity Nanostructured materials Photonic crystals Spontaneous emission Photonic devices Botey, M. Martorell, J. Lozano, G. Míguez, H. Dorado, L.A. Depine, R.A. Anomalous group velocity at the high energy range of real 3D photonic nanostructures
topic_facet	Fast ligth Nanomaterials Photonic bandgap materials Anomalous behavior Artificial opals Crystal size Dielectric spheres Fast ligth Finite size effect Group velocities High-energy range KKR method Lattice parameters Light wavelengths Nanomaterials Number of layers Opal films Phase delay Photonic bandgap materials Photonic nanostructures Spectral range Superluminal Theoretical study Electric fields Energy gap Group delay Light propagation Light velocity Nanostructured materials Photonic crystals Spontaneous emission Photonic devices
description	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. © 2010 Copyright SPIE - The International Society for Optical Engineering.
format	CONF
author	Botey, M. Martorell, J. Lozano, G. Míguez, H. Dorado, L.A. Depine, R.A.
author_facet	Botey, M. Martorell, J. Lozano, G. Míguez, H. Dorado, L.A. Depine, R.A.
author_sort	Botey, M.
title	Anomalous group velocity at the high energy range of real 3D photonic nanostructures
title_short	Anomalous group velocity at the high energy range of real 3D photonic nanostructures
title_full	Anomalous group velocity at the high energy range of real 3D photonic nanostructures
title_fullStr	Anomalous group velocity at the high energy range of real 3D photonic nanostructures
title_full_unstemmed	Anomalous group velocity at the high energy range of real 3D photonic nanostructures
title_sort	anomalous group velocity at the high energy range of real 3d photonic nanostructures
url	http://hdl.handle.net/20.500.12110/paper_0277786X_v7713_n_p_Botey
work_keys_str_mv	AT boteym anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures AT martorellj anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures AT lozanog anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures AT miguezh anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures AT doradola anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures AT depinera anomalousgroupvelocityatthehighenergyrangeofreal3dphotonicnanostructures
_version_	1807321099562647552

Anomalous group velocity at the high energy range of real 3D photonic nanostructures

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