Journal ArticleDOI
Near-field optical imaging of plasmon modes in gold nanorods.
TLDR
Investigation of optical properties of single gold nanorods by using an apertured-type scanning near-field optical microscope shows several longitudinal surface plasmon resonances, well reproduced by calculated local density-of-states maps.Abstract:
We have investigated optical properties of single gold nanorods by using an apertured-type scanning near-field optical microscope. Near-field transmission spectrum of single gold nanorod shows several longitudinal surface plasmon resonances. Transmission images observed at these resonance wavelengths show oscillating pattern along the long axis of the nanorod. The number of oscillation increases with decrement of observing wavelength. These spatial characteristics were well reproduced by calculated local density-of-states maps and were attributed to spatial characteristics of plasmon modes inside the nanorods. Dispersion relation for plasmons in gold nanorods was obtained by plotting the resonance frequencies of the plasmon modes versus the wave vectors obtained from the transmission images.read more
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Book
Plasmonics: Fundamentals and Applications
TL;DR: In this paper, the authors discuss the role of surface plasmon polaritons at metal/insulator interfaces and their application in the propagation of surfaceplasmon waveguides.
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
Near-Field Two-Photon-Induced Photoluminescence from Single Gold Nanorods and Imaging of Plasmon Modes
TL;DR: In this paper, the two-photon-induced photoluminescence properties of single gold nanorods were investigated by scanning near-field spectroscopy, and the process was found to be initiated by a sequential onephoton absorption for creating a pair of an electron and a hole in the sp and d bands.
Journal ArticleDOI
λ/4 Resonance of an Optical Monopole Antenna Probed by Single Molecule Fluorescence
TL;DR: In this article, a resonant optical nano-antenna positioned at the end of a metal-coated glass fiber near-field probe is compared to its radio frequency analogue, the monopole antenna.
Journal ArticleDOI
Fabry-Perot Resonances in One-Dimensional Plasmonic Nanostructures
Jens Dorfmüller,Ralf Vogelgesang,R. Thomas Weitz,Carsten Rockstuhl,Christoph Etrich,Thomas Pertsch,Falk Lederer,Klaus Kern +7 more
TL;DR: From eigenmodes well beyond quadrupolar order the combined symmetry breaking effects of oblique illumination and retardation allow the excitation of dipole forbidden, even order resonances.
References
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Journal ArticleDOI
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Journal ArticleDOI
Spectral properties and relaxation dynamics of surface plasmon electronic oscillations in gold and silver nanodots and nanorods
TL;DR: In this paper, the surface plasmon absorption of noble metal nanoparticles was studied and the effects of size, shape, and composition on the plasman absorption maximum and its bandwidth were discussed.
Journal ArticleDOI
Wet Chemical Synthesis of High Aspect Ratio Cylindrical Gold Nanorods
TL;DR: Gold nanorods with aspect ratios of 4.6 ± 1.2, 13 ± 2, and 18 ± 2.5 are prepared by a seeding growth approach in the presence of an aqueous miceller template.
Journal ArticleDOI
Optical stethoscopy: Image recording with resolution λ/20
TL;DR: In this paper, an extremely narrow aperture along a test object equipped with fine-line structures was used to demonstrate a resolving power of at least λ/20 which is to be compared with the values of λ 2.3 obtainable in conventional optical microscopy.
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