Nanoantenna-enhanced ultrafast nonlinear spectroscopy of a single gold nanoparticle

Schumacher, Thorsten; Kratzer, Kai; Molnár, Dávid; Hentschel, Mario; Gießen, Harald; Lippitz, Markus

doi:10.1038/ncomms1334

Cited by 125 publications

(97 citation statements)

References 35 publications

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“…In addition, Au and Ag nanostructures are relatively stable in ambient environments. They have, therefore, been intensively studied from the perspectives of both fundamental sciences [1][2][3] and potential applications in optics, [4][5][6] sensing, [7][8][9][10] imaging, [ 11 , 12 ] information processing, [ 13 ] photothermal therapeutics, [ 11 , 12 ] solar energy harvesting, [ 14 , 15 ] and photocatalysis. [ 16 , 17 ] Gold nanocrystals, especially Au nanorods, have been widely used as detection agents for analytical and biochemical applications as well as photothermal therapy, [ 11 , 12 ] owing to their chemical stability, synthetically tunable plasmon resonance bands within the visible and near-infrared spectral regions, and facile surface functionalization using thiol-containing molecules.…”

Section: Doi: 101002/adma201201896mentioning

confidence: 99%

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

et al. 2012

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Evolution of the sizes and plasmonic properties of (Au core)−(Ag shell) nanorods is studied. Four plasmon bands are observed on the core−shell nanorods and their properties are investigated. The lowest‐energy one belongs to the longitudinal dipolar plasmon mode, the second‐lowest‐energy one belongs to the transverse dipolar plasmon mode, and the two highest‐energy ones are ascribed to octupolar plasmon modes.

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Section: Doi: 101002/adma201201896mentioning

confidence: 99%

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

et al. 2012

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“…These characteristics allow phonon excitation and detection in nanostructures containing only hundreds of atoms 21 . Through electromagnetic coupling, larger nanoantennas have been used to enhance the phonon detection in adjacent smaller nanoparticles 22 . Recent advances in spatial control of surface plasmons from the far field have the potential to allow selective subwavelength detection of phonon modes-previously only possible using an X-ray free-electron laser 9 .…”

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confidence: 99%

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

et al. 2014

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Coherent acoustic phonons modulate optical, electronic and mechanical properties at ultrahigh frequencies and can be exploited for applications such as ultratrace chemical detection, ultrafast lasers and transducers. Owing to their large absorption cross-sections and high sensitivities, nanoplasmonic resonators are used to generate coherent phonons up to terahertz frequencies. Generating, detecting and controlling such ultrahigh frequency phonons has been a topic of intense research. Here we report that by designing plasmonic nanostructures exhibiting multimodal phonon interference, we can detect the spatial properties of complex phonon modes below the optical wavelength through the interplay between plasmons and phonons. This allows detection of complex nanomechanical dynamics by polarization-resolved transient absorption spectroscopy. Moreover, we demonstrate that the multiple vibrational states in nanostructures can be tailored by manipulating the geometry and dynamically selected by acousto-plasmonic coherent control. This allows enhancement, detection and coherent generation of tunable strains using surface plasmons.

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“…G old nanoparticles are proving to be a powerful tool to probe cell function and behaviour 1,2 . The unique properties of gold allow tagging of cellular components, local amplification of the excitation light field or dynamically reporting the positions and chemical compositions of compounds near the probe 3,4 .…”

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confidence: 99%

Laser-targeted photofabrication of gold nanoparticles inside cells

et al. 2014

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Nanoparticle manipulation is of increasing interest, since they can report single moleculelevel measurements of the cellular environment. Until now, however, intracellular nanoparticle locations have been essentially uncontrollable. Here we show that by infusing a gold ion solution, focused laser light-induced photoreduction allows in situ fabrication of gold nanoparticles at precise locations. The resulting particles are pure gold nanocrystals, distributed throughout the laser focus at sizes ranging from 2 to 20 nm, and remain in place even after removing the gold solution. We demonstrate the spatial control by scanning a laser beam to write characters in gold inside a cell. Plasmonically enhanced molecular signals could be detected from nanoparticles, allowing their use as nano-chemical probes at targeted locations inside the cell, with intracellular molecular feedback. Such light-based control of the intracellular particle generation reaction also offers avenues for in situ plasmonic device creation in organic targets, and may eventually link optical and electron microscopy.

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Nanoantenna-enhanced ultrafast nonlinear spectroscopy of a single gold nanoparticle

Cited by 125 publications

References 35 publications

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

Laser-targeted photofabrication of gold nanoparticles inside cells

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