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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/60230
Title: Porous silicon microcavities: synthesis, characterization, and application to photonic barcode devices
Authors: Ramiro-Manzano, F.; Fenollosa, Roberto; Xifré-Pérez, Elisabet; Garín, Moises; Meseguer, Francisco
Issue Date: 3-Sep-2012
Publisher: BioMed Central
Citation: Nanoscale Research Letters. 7(1):497 (2012)
Abstract: Abstract We have recently developed a new type of porous silicon we name as porous silicon colloids. They consist of almost perfect spherical silicon nanoparticles with a very smooth surface, able to scatter (and also trap) light very efficiently in a large-span frequency range. Porous silicon colloids have unique properties because of the following: (a) they behave as optical microcavities with a high refractive index, and (b) the intrinsic photoluminescence (PL) emission is coupled to the optical modes of the microcavity resulting in a unique luminescence spectrum profile. The PL spectrum constitutes an optical fingerprint identifying each particle, with application for biosensing. In this paper, we review the synthesis of silicon colloids for developing porous nanoparticles. We also report on the optical properties with special emphasis in the PL emission of porous silicon microcavities. Finally, we present the photonic barcode concept.
URI: http://hdl.handle.net/10261/60230
Identifiers: http://dx.doi.org/10.1186/1556-276X-7-497
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