Electromagnetic Energy Transport in Nanoparticle Chains via Dark Plasmon Modes

Solís, David; Willingham, Britain A.; Nauert, Scott L.; Slaughter, Liane Siu; Olson, Jana; Swanglap, Pattanawit; Paul, Aniruddha; Chang, Wei-Shun; Link, Stephan

doi:10.1021/nl2039327

Cited by 133 publications

(169 citation statements)

References 49 publications

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“…It is well known that different symmetries of closely coupled plasmonic particles can greatly alter interparticle interactions (13), controlling phenomena such as surface-enhanced Raman enhancement (40,41), Fano profiles and "dark" plasmon modes (42), and altering waveguide quality (43). Moreover, superlattices with higher metal volume fractions exhibit rich optical behavior (8)(9)(10)35).…”

Section: Resultsmentioning

confidence: 99%

Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices

Ross

Blaber

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Bottom-up assemblies of plasmonic nanoparticles exhibit unique optical effects such as tunable reflection, optical cavity modes, and tunable photonic resonances. Here, we compare detailed simulations with experiment to explore the effect of structural inhomogeneity on the optical response in DNA-gold nanoparticle superlattices. In particular, we explore the effect of background environment, nanoparticle polydispersity (>10%), and variation in nanoparticle placement (∼5%). At volume fractions less than 20% Au, the optical response is insensitive to particle size, defects, and inhomogeneity in the superlattice. At elevated volume fractions (20% and 25%), structures incorporating different sized nanoparticles (10-, 20-, and 40-nm diameter) each exhibit distinct far-field extinction and near-field properties. These optical properties are most pronounced in lattices with larger particles, which at fixed volume fraction have greater plasmonic coupling than those with smaller particles. Moreover, the incorporation of experimentally informed inhomogeneity leads to variation in far-field extinction and inconsistent electric-field intensities throughout the lattice, demonstrating that volume fraction is not sufficient to describe the optical properties of such structures. These data have important implications for understanding the role of particle and lattice inhomogeneity in determining the properties of plasmonic nanoparticle lattices with deliberately designed optical properties.T he rational arrangement of nanoparticles in multiple dimensions is a promising means for creating materials with novel properties not found in nature. Noble metal nanoparticles are interesting material building blocks due to their ability to amplify local fields by orders of magnitude and scatter light well below the diffraction limit. These efficient interactions with visible light are due to localized surface plasmon resonances (LSPRs), the collective oscillation of conduction electrons (1). Hierarchical arrangements of plasmonic nanoparticles have become the basis for colorimetric sensors (2, 3), subdiffraction limited waveguides (4), visible light metamaterials (5), and nanoscale lasing devices (6, 7), and the ability to adjust architecture in such materials has led to a wide variety of structures with tunable and unusual optical properties (8-12). Many of these technologies leverage the scalability and modularity of bottom-up assembly techniques, which use chemically synthesized colloidal nanoparticles as building blocks (13,14). Unfortunately, all nanoparticle assembly techniques result in materials with structural defects across multiple length scales, including imprecise particle placement, grain boundaries, and variation in crystallite size. In addition, the nanoparticles used in these systems are inherently inhomogeneous: varying in size, shape, and radius of curvature. Although the effects of inhomogeneity have been investigated at the individual nanoparticle level (15, 16), the effects of inhomogeneity on plasmonic assemblies are...

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Section: Resultsmentioning

confidence: 99%

Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices

Ross

Blaber

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…21,[46][47][48][49] As NPs are added successively to the length of the chain, the superradiant mode initially shows a continuous redshift, which then saturates as an infinite chain limit is reached. To summarize a body of literature, as long as 2.0 < D/r ≤ 2.5, where D is the center-to-center distance between the NPs and r is the NP radius, the energy of the lowest energy peak plateaus for a number of repeat units, N L , between 5 and 10, even though a range of r (5 -55 nm) and interparticle gaps (0.5 -30 nm) has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic polymers unraveled through single particle spectroscopy

et al. 2014

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Plasmonic polymers are quasi one-dimensional assemblies of nanoparticles whose optical responses are governed by near-field coupling of localized surface plasmons. Through single particle extinction spectroscopy correlated with electron microscopy, we reveal the effect of the composition of the repeat unit, the chain length, and extent of disorder on the energies, intensities, and line shapes of the collective resonances of individual plasmonic polymers constructed from three different sizes of gold nanoparticles. Our combined experiment and theoretical analysis focuses on the superradiant plasmon mode, which results from the most attractive interactions along the nanoparticle chain and yields the lowest energy resonance in the spectrum. This superradiant mode redshifts with increasing chain length until an infinite chain limit, where additional increases in chain length cause negligible change in the energy of the superradiant mode. We find that, among plasmonic polymers of equal width comprising nanoparticles with different sizes, the onset of the infinite chain limit and its associated energy are dictated by the number of repeat units and not the overall length, of the polymer. The intensities and linewidths of the superradiant mode relative to higher energy resonances, however, differ as the size and number of nanoparticles are varied in the plasmonic polymers studied here. These findings provide general guidelines for engineering the energies, intensities, and line shapes of the collective optical response of plasmonic polymers constructed from nanoparticles with sizes ranging from a few tens to one hundred nanometers.

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“…The propagation distance is currently limited by the intrinsic electronphonon, electron-defect interaction within each particle as well as radiation loss. In some particular 2D optical spectroscopy imaging, it has been shown recently that the propagation/distribution of the plasmon-polariton could even be mapped for 1D nanoparticles chains [2,6]. The visualization of these plasmons at the interface air/nanostructure with near-field imaging [5] or with an electron beam imaging [7] were also reported.…”

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confidence: 97%

Ultrafast acousto-plasmonics in gold nanoparticle superlattices

et al. 2015

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We report the investigation of the generation and detection of GHz coherent acoustic phonons in plasmonic gold nanoparticles superlattices (NPS). The experiments have been performed from an optical femtosecond pump-probe scheme across the optical plasmon resonance of the superlattice. Our experiments allow to estimate the collective elastic response (sound velocity) of the NPS as well as an estimate of the nano-contact elastic stiffness. It appears that the light-induced coherent acoustic phonon pulse has a typical in-depth spatial extension of about 45 nm which is roughly 4 times the optical skin depth in gold. The modeling of the transient optical reflectivity indicates that the mechanism of phonon generation is achieved through ultrafast heating of the NPS assisted by light excitation of the volume plasmon. These results demonstrate how it is possible to map the photon-electron-phonon interaction in subwavelength nanostructures.PACS numbers: 78.67. Pt, 73.20.Mf, Plasmon assisted subwavelength light transmission is a key physical mechanism for modern nano-optics and nano-plasmonics [1]. The propagation of plasmonpolariton waves in nano particles nanostructures (chains, arrays) is at the core of intense fundamental investigations and has led to numerous reports [2-6]. For plasmonic applications, it is obviously crucial to understand and control the damping of these plasmonpolariton waves, i.e. the collective propagation distance. This propagation distance as well as a more general description of the dispersion curves for both longitudinal and transverse light electric field have already been obtained for supported 1D chains [2][3][4][5]. The propagation distance is currently limited by the intrinsic electronphonon, electron-defect interaction within each particle as well as radiation loss. In some particular 2D optical spectroscopy imaging, it has been shown recently that the propagation/distribution of the plasmon-polariton could even be mapped for 1D nanoparticles chains [2,6]. The visualization of these plasmons at the interface air/nanostructure with near-field imaging [5] or with an electron beam imaging [7] were also reported. This stateof-art 2D imaging is however limited to 1D or 2D systems, i.e. to surface plasmonics and no local measurement of volume plasmon-polariton propagation has been reported for 3D nanoparticles arrays so far. Most of the plasmonic responses in nanoparticles superlattices are obtained indeed from far field optical absorbance measurements [8,9]. Because of the difficulty to probe the innner part of a plasmonic superlattices, no quantitative depth profiling description of the plasmon-polariton propagation have been reported to date. However, it is known that ultrafast optical techniques can provide a picture in time and space of the light-matter interaction [10][11][12]. In particular, in case of femtosecond light pulses, the light-matter coupling can lead to the emission of coherent acoustic phonons that occurs all over the spatial extension where the light energy is converted in...

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Electromagnetic Energy Transport in Nanoparticle Chains via Dark Plasmon Modes

Cited by 133 publications

References 49 publications

Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices

Defect tolerance and the effect of structural inhomogeneity in plasmonic DNA-nanoparticle superlattices

Plasmonic polymers unraveled through single particle spectroscopy

Ultrafast acousto-plasmonics in gold nanoparticle superlattices

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