Publisher’s Note: Cascaded Optical Field Enhancement in Composite Plasmonic Nanostructures [Phys. Rev. Lett.<b>105</b>, 246806 (2010)]

Kravets, V. G.; Burrows, Christopher P.; Schedin, F.; Casiraghi, Cinzia; Klar, Philipp; Barnes, Bill; Григоренко, А. Н.

doi:10.1103/physrevlett.105.269906

Cited by 9 publications

(12 citation statements)

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“…Based on this parallelism, we can establish an atomic-scale analogy with the macroscopic plasmonic lens of self-similar antennas. [91][92][93]99 As demonstrated here, in a realistic nanogap, the key features of the field enhancement can easily reach the atomic-scale. Therefore, a description of the plasmonic response based on smooth interface profiles, either classical or quantum, might not be able to address this atomic-scale near-field regime.…”

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confidence: 65%

“…We can thus establish an analogy with the macroscopic selfsimilar plasmonic nanoantennas, where larger antennas produce further enhancement on the smallest ones, like in a plasmonic lens. [91][92][93] Here, the sub-nanometer 'hot-spots' induced around atomically sharp features are fed in a cascade fashion by the plasmonic field of the larger and smoother nanometric plasmonic system (hosting particle or dimer).…”

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confidence: 99%

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Atomistic Near-Field Nanoplasmonics: Reaching Atomic-Scale Resolution in Nanooptics

et al. 2015

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Electromagnetic field localization in nanoantennas is one of the leitmotivs that drives the development of plasmonics. The near-fields in these plasmonic nanoantennas are commonly addressed theoretically within classical frameworks that neglect atomic-scale features. This approach is often appropriate since the irregularities produced at the atomic scale are typically hidden in far-field optical spectroscopies. However, a variety of physical and chemical processes rely on the fine distribution of the local fields at this ultraconfined scale. We use time-dependent density functional theory and perform atomistic quantum mechanical calculations of the optical response of plasmonic nanoparticles, and their dimers, characterized by the presence of crystallographic planes, facets, vertices, and steps. Using sodium clusters as an example, we show that the atomistic details of the nanoparticles morphologies determine the presence of subnanometric near-field hot spots that are further enhanced by the action of the underlying nanometric plasmonic fields. This situation is analogue to a self-similar nanoantenna cascade effect, scaled down to atomic dimensions, and it provides new insights into the limits of field enhancement and confinement, with important implications in the optical resolution of field-enhanced spectroscopies and microscopies.

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confidence: 65%

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confidence: 99%

Atomistic Near-Field Nanoplasmonics: Reaching Atomic-Scale Resolution in Nanooptics

et al. 2015

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“…Benefiting from the advance in nanofabrication techniques, many other non‐conventional nanostructures such as nanotips,23 nanobowls,24, 25 nanowires,26, 27 nanorings,28 and nanocrescent moons have been reported 29, 30. Recently it is discovered that the composite metallic nanostructure can provide further field enhancement for SERS application 31, 32. For example, a “particle in cavity” structure has been demonstrated very recently to produce extremely high field enhancements due to the cascaded focusing of the optical cross‐sections into small gaps 33.…”

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confidence: 99%

Highly Ordered Arrays of Particle‐in‐Bowl Plasmonic Nanostructures for Surface‐Enhanced Raman Scattering

Li¹,

Zhang²,

Shen³

et al. 2012

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A highly ordered particle-in-bowl (PIB) nanostructure array is designed and fabricated to achieve large field enhancement for the surface-enhanced Raman scattering (SERS) application. This new type of PIB structure is composed of an Ag particle located at the bottom of an Au bowl, and the two are separated by a precisely controlled nanoscale dielectric layer. The fabrication of the PIB structure is based on the self-assembly of polystyrene spheres and atomic layer deposition (ALD), which allows good control of the metal particle size and gap distance, as well as large-scale ordering. Numerical simulation reveals a high enhancement of the local field at the nanogaps. The SERS performance of the PIB arrays, and the effects of the Ag particle size and the ALD dielectric layer thickness are characterized, results of which are in reasonable agreement with simulation. With Rhodmaine 6G as the probe molecule, the spatially averaged SERS enhancement factor is on the order of 3.8 × 10(7) and the local field enhancement from simulation can be up to 10(8) .

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“…We modeled the enhancement of the electric field with the help of finite difference time-domain analysis using the High Frequency Structure Simulator (HFSS11) [35]. The actual device geometry was utilized in the model, and the optical constants of gold, graphene and the substrate were taken from Ref.…”

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confidence: 99%

“…We believe that further optimization of such plasmonic nanostructures (e.g. making use of coupled or cascaded plasmon resonances [35,36]) might lead to even greater photovoltage enhancement.…”

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Strong plasmonic enhancement of photovoltage in graphene

et al. 2011

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From the wide spectrum of potential applications of graphene, ranging from transistors and chemical sensors to nanoelectromechanical devices and composites, the field of photonics and optoelectronics is believed to be one of the most promising. Indeed, graphene's suitability for high-speed photodetection was demonstrated in an optical communication link operating at 10 Gbit s − 1 . However, the low responsivity of graphene-based photodetectors compared with traditional III-V-based ones is a potential drawback. Here we show that, by combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodetectors can be increased by up to 20 times, because of efficient field concentration in the area of a p-n junction. Additionally, wavelength and polarization selectivity can be achieved by employing nanostructures of different geometries.

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Publisher’s Note: Cascaded Optical Field Enhancement in Composite Plasmonic Nanostructures [Phys. Rev. Lett.105, 246806 (2010)]

Cited by 9 publications

References 0 publications

Atomistic Near-Field Nanoplasmonics: Reaching Atomic-Scale Resolution in Nanooptics

Atomistic Near-Field Nanoplasmonics: Reaching Atomic-Scale Resolution in Nanooptics

Highly Ordered Arrays of Particle‐in‐Bowl Plasmonic Nanostructures for Surface‐Enhanced Raman Scattering

Strong plasmonic enhancement of photovoltage in graphene

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