Optical properties of surface plasmon resonances of coupled metallic nanorods
Reads0
Chats0
TLDR
A photonic device, a plasmonic optical antenna fiber probe, is proposed that can potentially be used for in-situ chemical and biological detection and surface-enhanced Raman scattering.Abstract:
We present a systematic study of optical antenna arrays, in which the effects of coupling between the antennas, as well as of the antenna length, on the reflection spectra are investigated and compared. Such arrays can be fabricated on the facet of a fiber, and we propose a photonic device, a plasmonic optical antenna fiber probe, that can potentially be used for in-situ chemical and biological detection and surface-enhanced Raman scattering.read more
Citations
More filters
Journal ArticleDOI
Gold Nanorods: From Synthesis and Properties to Biological and Biomedical Applications
TL;DR: Of all the possible nanoparticle shapes, gold nanorods are especially intriguing as they offer strong plasmonic fields while exhibiting excellent tunability and biocompatibility, according to a review of their radiative and nonradiative properties.
Journal ArticleDOI
Gold nanorods and their plasmonic properties
TL;DR: This review presents a comprehensive overview of the flourishing field of Au nanorods in the past five years, focusing mainly on the approaches for the growth, shape and size tuning, functionalization, and assembly of Au Nanorods, as well as the methods for the preparation of their hybrid structures.
Journal ArticleDOI
Anisotropic gold nanoparticles: synthesis, properties, applications, and toxicity
TL;DR: The application of anisotropic AuNPs has rapidly spread to optical, biomedical, and catalytic areas, and a summary of the synthetic modes, variety of shapes, applications, and toxicity issues of this fast-growing class of nanomaterials is given.
Journal ArticleDOI
Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing
Shaohua Pi,Xie Zeng,Nan Zhang,Dengxin Ji,Borui Chen,Haomin Song,Alec Cheney,Yun Xu,Suhua Jiang,Dalin Sun,Yun Song,Qiaoqiang Gan +11 more
TL;DR: A dielectric grating that can launch surface plasmon resonance (SPR) modes efficiently on the other side of flat metal films, which is similar to the conventional prism coupling mechanism, was proposed in this paper.
Journal ArticleDOI
Optical antenna arrays on a fiber facet for in situ surface-enhanced Raman scattering detection
TL;DR: A bidirectional fiber optic probe for the detection of surface-enhanced Raman scattering (SERS) features an array of gold optical antennas designed to enhance Raman signals, while the other facet of the fiber is used for the input and collection of light.
References
More filters
Journal ArticleDOI
Interparticle Coupling Effects on Plasmon Resonances of Nanogold Particles
TL;DR: In this article, the authors investigate the coupling between pairs of elliptical metal particles by simulations and experiments and demonstrate that the resonant wavelength peak of two interacting particles is red-shifted from that of a single particle because of near-field coupling.
Journal ArticleDOI
Optical properties of two interacting gold nanoparticles
W. Rechberger,Andreas Hohenau,Alfred Leitner,Joachim R. Krenn,Bernhard Lamprecht,Franz R. Aussenegg +5 more
TL;DR: In this paper, surface plasmon excitation in pairs of identical Au nanoparticles by optical transmission spectroscopy was studied and it was shown that with decreasing interparticle distance the surface plasm resonance shifts to longer wavelengths for a polarization direction parallel to the long particle pair axis whereas a blueshift is found for the orthogonal polarization.
Journal ArticleDOI
Nanoscale chemical analysis by tip-enhanced Raman spectroscopy
TL;DR: In this article, a fine metal tip brought to within a few nanometers of a molecular film was found to give strong enhancement of Raman scattered light from the sample, which can be used for molecular analysis with excellent spatial resolution.
Journal ArticleDOI
Wavelength-scanned surface-enhanced Raman excitation spectroscopy.
TL;DR: Three vibrational modes of benzenethiol are studied simultaneously on one substrate, and it is demonstrated that the smaller Raman shifted peak shows a maximum enhancement closer to the LSPR lambda(max) than that of a larger Raman shift peak, in agreement with the predictions of the electromagnetic enhancement mechanism of SERS.
Journal ArticleDOI
Localized Surface Plasmon Resonance Spectroscopy of Single Silver Triangular Nanoprisms
TL;DR: The dipole resonance is found to be very intense, and its peak wavelength is extremely sensitive to the height, edge length, and tip sharpness of the triangular nanoprism, which is the highest short-range refractive index sensitivity yet measured for a nanoparticle.