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Open AccessJournal ArticleDOI

Nanoantennas for visible and infrared radiation.

TLDR
The role of plasmonic resonances on the performance of nanoantennas and the influence of geometrical parameters imposed by nanofabrication are discussed.
Abstract
Nanoantennas for visible and infrared radiation can strongly enhance the interaction of light with nanoscale matter by their ability to efficiently link propagating and spatially localized optical fields. This ability unlocks an enormous potential for applications ranging from nanoscale optical microscopy and spectroscopy over solar energy conversion, integrated optical nanocircuitry, opto-electronics and density-of-states engineering to ultra-sensing as well as enhancement of optical nonlinearities. Here we review the current understanding of metallic optical antennas based on the background of both well-developed radiowave antenna engineering and plasmonics. In particular, we discuss the role of plasmonic resonances on the performance of nanoantennas and address the influence of geometrical parameters imposed by nanofabrication. Finally, we give a brief account of the current status of the field and the major established and emerging lines of investigation in this vivid area of research.

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Citations
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Journal ArticleDOI

Atomic-scale confinement of resonant optical fields

TL;DR: By means of self-assembly, side-by-side aligned gold nanorod dimers with robust atomically defined gaps reaching below 0.5 nm are obtained, opening new perspectives for atomically resolved spectroscopic imaging, deeply nonlinear optics, ultrasensing, cavity optomechanics, as well as for the realization of novel quantum-optical devices.
Journal ArticleDOI

Plasmonics in Nanostructures

TL;DR: Some typical functional plasmonic nanostructures and nanosmart devices emerging from individual and collaborative research works are reviewed.
Journal ArticleDOI

Spectroscopy and Biosensing with Optically Resonant Dielectric Nanostructures

TL;DR: In this paper, the authors present state-of-the-art applications of optically resonant high-index dielectric nanostructures as a multifunctional platform for light-matter interactions.
Journal ArticleDOI

Infrared and Raman chemical imaging and spectroscopy at the nanoscale

TL;DR: Rapid innovation in the last 5 years has pushed the performance of AFM-IR and TERS, in principle spectroscopically complimentary, techniques well beyond initial expectations, thus opening new opportunities for their convergence.
Journal ArticleDOI

Enhancement of Second-Harmonic Generation from Metal Nanoparticles by Passive Elements

TL;DR: This work prepares arrays of gold nanoparticles that include both noncentrosymmetric particles with a second-order nonlinear optical response and passive particles with no second- order response, providing a completely new concept for optimizing the nonlinear responses of metamaterials.
References
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Book

Classical Electrodynamics

Book

Absorption and Scattering of Light by Small Particles

TL;DR: In this paper, a Potpourri of Particles is used to describe surface modes in small Particles and the Angular Dependence of Scattering is shown to be a function of the size of the particles.
Book

Computational Electrodynamics: The Finite-Difference Time-Domain Method

Allen Taflove
TL;DR: This paper presents background history of space-grid time-domain techniques for Maxwell's equations scaling to very large problem sizes defense applications dual-use electromagnetics technology, and the proposed three-dimensional Yee algorithm for solving these equations.
Journal ArticleDOI

Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering

TL;DR: In this article, surface-enhanced Raman scattering was used to detect single molecules and single nanoparticles at room temperature with the use of surface enhanced Raman, and the intrinsic Raman enhancement factors were on the order of 10 14 to 10 15, much larger than the ensemble-averaged values derived from conventional measurements.
Journal ArticleDOI

Plasmonics for improved photovoltaic devices

TL;DR: Recent advances at the intersection of plasmonics and photovoltaics are surveyed and an outlook on the future of solar cells based on these principles is offered.
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