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Light propagation in self-assembled hybrid metallodielectric structures

AutorBlanco Montes, Álvaro ; Galisteo-López, J. F.; López-García, M. ; García-Martín, Antonio ; López, Cefe
Fecha de publicaciónjun-2011
CitaciónInternational Workshop on Nanophotonics for Energy and the Environment (2011)
ResumenSelf-assembly is a well established approach to fabricate photonic structures able to manipulate light propagation and emission at the nanoscale. Beyond its use as a means to fabricate photonic crystals recent reports have shown how self-assembly techniques can be used to fabricate hybrid photonic-plasmonic crystals that allow strong modification of the spontaneous emission of internal sources [2]. Further, the sensitivity of their optical response to their environment has been proposed as a means to use this kind of systems of optical sensors, and means to control their optical properties by modifying the dielectric components have been demonstrated. In these hybrid structures, where periodic arrays of dielectric colloids are deposited on metallic substrates, electromagnetic fields undergo a strong spatial redistribution and strong field enhancements can be achieved. Depending on the spectral range under consideration electromagnetic fields can be localized close to the metal substrate (plasmon-like modes) or within the dielectric array (waveguided-like modes). Several metallodielectric structures have been fabricated employing gold or silver substrates and their optical response has been compared to reference samples grown on dielectric substrates in order to better appreciate the effect of the metallic component. The dispersion relation of such structures has been probed by means of angle and polarization resolved reflectivity measurements.
DescripciónPóster presentado en el International Workshop on Nanophotonics for Energy and the Environment, celebrado en Sanxenxo del 8 al 10 de junio de 2011.
URIhttp://hdl.handle.net/10261/135274
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