Damping of Acoustic Vibrations of Single Gold Nanoparticles Optically Trapped in Water

Ruijgrok, Paul V.; Zijlstra, Peter; Tchebotareva, Anna L.; Orrit, Michel

doi:10.1021/nl204311q

Cited by 155 publications

(299 citation statements)

References 51 publications

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“…Simulations of a periodic array of Swiss-crosses on a glass substrate with no internal damping yield quality factors (Q4500, see Supplementary Fig. 1) much larger than the experimentally observed quality factors, which suggests internal damping [27][28][29] and inhomogeneous broadening may contribute to the linewidth of the measured signals.…”

Section: Resultsmentioning

confidence: 86%

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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Section: Resultsmentioning

confidence: 86%

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

et al. 2014

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“…Important to note is that inhomogeneous broadening due to morphological differences among a population of nanoantennas is absent because we measured the response of single rods. The internal material damping that accounts for the gold internal friction, inhomogeneities and disorder-related effects [32] should be similar in both situations (i.e. with and without silica added) and therefore may not be the reason for the quality factor change.…”

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confidence: 99%

Tailored Hypersound Generation in Single Plasmonic Nanoantennas

et al. 2016

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Ultra-short laser pulses impinging on a plasmonic nanostructure trigger a highly dynamic scenario in the interplay of electronic relaxation with lattice vibrations, which can be experimentally probed via the generation of coherent phonons. In this letter we present studies of hypersound generation in the range of a few to tens of GHz on single gold plasmonic nanoantennas, which have additionally been subjected to pre-designed mechanical constraints via silica bridges. Using these hybrid gold/silica nanoantennas, we demonstrate experimentally and via numerical simulations how mechanical constraints allow control over their vibrational mode spectrum. Degenerate pump-probe techniques with double

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“…5 The frequencies n ω and damping rate n γ of a sphere are given by: which we previously used to analyze results for single Au nanoparticles optically trapped in water. 7 In the calculation of the viscous damping we have used the viscosity of water at 30 o C as in Saviot et al 6 The model includes sound radiation and damping by bulk and shear viscosities by writing the speeds of sound in the environment as …”

Section: Vibrations Of An Embedded Spherical Particlementioning

confidence: 99%

Damping of Acoustic Vibrations of Immobilized Single Gold Nanorods in Different Environments

et al. 2013

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We present measurements of the acoustic vibrations of single gold nanorods deposited on a glass substrate immersed in air and water by ultrafast pump−probe spectroscopy. The nanorods display two vibration modes, the breathing mode and the extensional mode. The damping time of the two modes is influenced by the environment, and a reduction of the quality factor is observed when the particles are immersed in water. The reduced quality factor of the breathing mode is in good agreement with a model that takes into account viscous damping and radiation of sound waves into the medium. The extension mode, however, is heavily damped when the particles are immersed in water, which is attributed to hydrodynamic lubrication forces between the nanoparticle and the glass substrate. Our results identify a new mode of damping in supported nanoparticles and indicate that the immersion medium can have different effects on different modes of vibration.

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Damping of Acoustic Vibrations of Single Gold Nanoparticles Optically Trapped in Water

Cited by 155 publications

References 51 publications

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

Ultrafast acousto-plasmonic control and sensing in complex nanostructures

Tailored Hypersound Generation in Single Plasmonic Nanoantennas

Damping of Acoustic Vibrations of Immobilized Single Gold Nanorods in Different Environments

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