Open AccessJournal Article
Giant optical responses in microcavity-fractal composites
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TLDR
In this article, a theory for the enhanced Raman and hyper-Raman surface-enhanced scattering in microcavity-fractal composites is developed, where fractal geometry results in localization of plasmon excitations in the hot spots, where the local field can exceed the applied field by several orders of magnitude.Abstract:
Optical properties of fractal nanostructured composite materials are considered. The fractal geometry results in localization of plasmon excitations in the hot spots, where the local field can exceed the applied field by several orders of magnitude. The high local fields of the localized fractal modes result in dramatic enhancement of optical responses, making feasible the surface-enhanced nonlinear spectroscopy of single molecules and nanocrystals. The field enhancement becomes especially large when fractals are placed inside a microcavity. A theory for the enhanced Raman and hyper-Raman surface-enhanced scattering in microcavity-fractal composites is developed.read more
Citations
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Journal ArticleDOI
Surface-enhanced Raman scattering and biophysics
TL;DR: Surface-enhanced Raman scattering (SERS) is a spectroscopic technique which combines modern laser spectroscopy with the exciting optical properties of metallic nanostructures, resulting in strongly increased Raman signals when molecules are attached to nanometre-sized gold and silver structures.
Journal ArticleDOI
Surface-Enhanced Raman Scattering from Silver-Plated Porous Silicon
TL;DR: In this article, the SERS spectra of Rhodamine 6G (R6G) and adenine were obtained using an 18mW, 488-nm laser, and the performance of these analytes was dramatically improved by pretreatment of the silver-plated porous Si samples (Ag−PS) with a 1 mM mineral acid solution.
Journal ArticleDOI
Strongly enhanced light trapping in a two-dimensional silicon nanowire random fractal array.
Barbara Fazio,Pietro Artoni,Maria Antonia Iatì,Cristiano D’Andrea,Maria Josè Lo Faro,Salvatore Del Sorbo,S. Pirotta,Pietro Giuseppe Gucciardi,Paolo Musumeci,Cirino Vasi,Rosalba Saija,Matteo Galli,Francesco Priolo,Francesco Priolo,Alessia Irrera +14 more
TL;DR: It is shown that the random fractal structure of the nanowire array is responsible for a strong in-plane multiple scattering, which is related to the material refractive index fluctuations and leads to a greatly enhanced Raman scattering and a bright photoluminescence.
Book ChapterDOI
Noble Metal Nanoparticles: Synthesis and Optical Properties
TL;DR: In this article, the fundamental and unique optical properties of noble metal nanoparticles are explained, based on the Mie application, and the well-known quasistatic approximation is derived and subsequently extended to more general cases.
References
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Journal ArticleDOI
The Fractal Geometry of Nature
TL;DR: A blend of erudition (fascinating and sometimes obscure historical minutiae abound), popularization (mathematical rigor is relegated to appendices) and exposition (the reader need have little knowledge of the fields involved) is presented in this article.
Book
Nonlinear optics of random media : fractal composites and metal-dielectric films
TL;DR: In this paper, a review of basic approaches for surface-enhanced nonlinear optical properties of random composites can be found, including Surface-Enhanced Nonlinear Optical Phenomena, Small Particle Fractal Aggregates, Self-Affine Thin Films and Random Metal-Dielectric Films.
BookDOI
Microcavities and photonic bandgaps: physics and applications
John Rarity,Claude Weisbuch +1 more
TL;DR: Weisbuch et al. as discussed by the authors proposed a method for measuring spontaneous emission in planar semiconductor microcavities using a near-field probe and showed that it is possible to estimate spontaneous emission rate near a surface using Green's functions.
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