Oblique surface waves at an interface between a metal–dielectric superlattice and an isotropic dielectric
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Título: | Oblique surface waves at an interface between a metal–dielectric superlattice and an isotropic dielectric |
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Autor/es: | Vuković, Slobodan | Miret, Juan Jose | Zapata Rodríguez, Carlos Javier | Jakšić, Zoran |
Grupo/s de investigación o GITE: | Óptica y Ciencias de la Visión |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía |
Palabras clave: | Condensed matter: electrical, magnetic and optical | Surfaces, interfaces and thin films | Nanoscale science and low-D systems |
Área/s de conocimiento: | Óptica |
Fecha de publicación: | 27-abr-2012 |
Editor: | IOP Publishing |
Cita bibliográfica: | Physica Scripta. 2012, T149: 014041 (3pp). doi:10.1088/0031-8949/2012/T149/014041 |
Resumen: | We investigate the existence and dispersion characteristics of surface waves that propagate at an interface between a metal–dielectric superlattice and an isotropic dielectric. Within the long-wavelength limit, when the effective-medium (EM) approximation is valid, the superlattice behaves like a uniaxial plasmonic crystal with the main optical axes perpendicular to the metal–dielectric interfaces. We demonstrate that if such a semi-infinite plasmonic crystal is cut normally to the layer interfaces and brought into contact with a semi-infinite dielectric, a new type of surface mode can appear. Such modes can propagate obliquely to the optical axes if favorable conditions regarding the thickness of the layers and the dielectric permittivities of the constituent materials are met. We show that losses within the metallic layers can be substantially reduced by making the layers sufficiently thin. At the same time, a dramatic enlargement of the range of angles for oblique propagation of the new surface modes is observed. This can lead, however, to field non-locality and consequently to failure of the EM approximation. |
Patrocinador/es: | This work was supported by the Qatar National Research Fund (NPRP 09-462-1-074). SMV and ZJ acknowledge support from the Serbian Ministry of Education and Science through projects III 45016 and TR 32008. CJZ-R and JJM acknowledge support from the Spanish Ministry of Science and Innovation through grant no. TEC2009-11635. |
URI: | http://hdl.handle.net/10045/36222 |
ISSN: | 0031-8949 (Print) | 1402-4896 (Online) |
DOI: | 10.1088/0031-8949/2012/T149/014041 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2012 IOP Publishing |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1088/0031-8949/2012/T149/014041 |
Aparece en las colecciones: | INV - IMAOS+V - Artículos de Revistas |
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2012_Vukovic_etal_PhysScr.pdf | Versión revisada (acceso abierto) | 403,34 kB | Adobe PDF | Abrir Vista previa |
2012_Vukovic_etal_PhysScr-final.pdf | Versión final (acceso restringido) | 179,16 kB | Adobe PDF | Abrir Solicitar una copia |
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