From silver nanolentils to nanocolumns: surface plasmon–polaritons and confined acoustic vibrations

Margueritat, Jérémie; Gonzalo, J.; Afonso, Carmen N.; Bachelier, Guillaume; Mlayah, Adnen; Laarakker, Avra S.; Murray, D. B.; Saviot, Lucien

doi:10.1007/s00339-007-4120-8

Cited by 19 publications

(19 citation statements)

References 21 publications

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“…Figure 2a is displayed the Raman spectrum of the sphere obtained in the context of Born approximation, i.e., replacing the real internal field LX" ( ) by the applied one < L • , leading to a perfectly uniform internal field amplitude inside the nanoparticle. The calculated spectrum in Figure 2a, dominated by the fundamental quadrupolar mode, is in agreement with the measured spectra in previous experiments 5,9,10,62 performed on small nanoparticles (<5 nm) in which the internal electric field can actually be considered as uniform. Considering the exact distribution of the internal field (Figure 2b), i.e.…”

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confidence: 89%

Inelastic Light Scattering by Multiple Vibrational Modes in Individual Gold Nanodimers

et al. 2019

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To be Raman-active (or, more generally, detectable using optical spectroscopy techniques), a vibrational mode of a nanosystem has to modulate its optical response. For small, isolated nanospheres, this is the case for only two categories of vibrational modes, namely quadrupolar and radial ones. However, assembling nanospheres as dimers makes additional modes Raman-active, as previously demonstrated by the detection in the ultralow frequency range of a hybridized quasi-translation mode in previous measurements on single and ensembles of gold nanosphere dimers. In the present work, we use our recently developed single-particle Raman spectroscopy setup to compare inelastic light scattering by single isolated and dimerized gold nanospheres in an extended frequency range (0-40 GHz). The Raman spectra acquired on isolated nanoparticles present a single peak associated to their fundamental quadrupolar mode, consistently with previous ensemble measurements. In contrast, the spectra measured on dimers are richer and display a number of peaks increasing with decreasing interparticle distance, with all = 2 − 8 Lamb modes detected in the quasicontact case. These observations are rationalized using a recently developed classical model of inelastic light scattering by nanospheres. Importantly, our modeling approach takes into account the real electric field within the nanoparticles DID contribution and the local changes of the intrinsic microscopic polarizabilities induced by the vibrations, and second the multiple scattering processes affecting the Stokes and anti-Stokes photons. Moreover, building a full opto-mechanical model of Raman scattering by nanoparticle dimers (or oligomers) simultaneously taking into account electromagnetic (as here) and acoustic (as in our previous works 24,25) interactions between close nanoparticles would be useful to address in more detail the inelastic scattering by =1 Lamb modes, which are highly affected by acoustic hybridization. ASSOCIATED CONTENT Supporting Information Determination of the input parameters; analysis of the extinction cross-sections; analysis of the Low Frequency Raman Spectra (LFRS) of the monomer, dimer A and dimer B; dependence of the LFSR on the inter-particle distance in dimers; comments about the dipole-induced-dipole mechanism; phenomenological modeling of the multiple scattering of the Stokes and anti-Stokes photons. This material is available free of charge via the Internet at http://pubs.acs.org.

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confidence: 89%

Inelastic Light Scattering by Multiple Vibrational Modes in Individual Gold Nanodimers

et al. 2019

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“…The optical properties of silver nanoparticles have been studied experimentally using optical transmission spectroscopy [11]. Recently various types of arrays of metal nanorods were produced using selfassembly of nanoparticles, lithographic and nanoimprinting techniques [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Light transmission and local field enhancement in arrays of silver nanocylinders

Giloan

Zaiba

Vitrant

et al. 2011

Optics Communications

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“…Arrays of parallel nanowires have also been suggested as suitable structures for sub-wavelength imaging [4,5,6]. The optical and vibrational properties of silver particles have been studied experimentally using optical transmission spectroscopy and low-frequency Raman scattering [7]. It has been suggested that SPRs have the potential to allow very-large-scale-integration of photonic devices at high packing densities [8,9].…”

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confidence: 99%

Waveguiding and plasmon resonances in two-dimensional photonic lattices of gold and silver nanowires

et al. 2008

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We report the fabrication of triangular lattices of parallel gold and silver nanowires of high optical quality, with diameters down to 500 nm and length-to-diameter ratios as high as 100 000. The nanowires are supported by a silica glass matrix and are disposed around a central solid glass core, i.e., a missing nanowire. These centimeter-long structures make it possible to trap light within an array of nanowires and characterize the plasmon resonances that form at specific optical frequencies. Such nanowire arrays have many potential applications, e.g., imaging on the subwavelength scale

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From silver nanolentils to nanocolumns: surface plasmon–polaritons and confined acoustic vibrations

Cited by 19 publications

References 21 publications

Inelastic Light Scattering by Multiple Vibrational Modes in Individual Gold Nanodimers

Inelastic Light Scattering by Multiple Vibrational Modes in Individual Gold Nanodimers

Light transmission and local field enhancement in arrays of silver nanocylinders

Waveguiding and plasmon resonances in two-dimensional photonic lattices of gold and silver nanowires

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