Plasmonic Coupling Effect in Ag Nanocap–Nanohole Pairs for Surface-Enhanced Raman Scattering

Wen, Xiaolei; Xi, Zheng; Jiao, Xiaojin; Yu, Wenhai; Xue, Guosheng; Zhang, Douguo; Lu, Yonghua; Wang, Pei; Blair, Steve; Ming, Hai

doi:10.1007/s11468-012-9379-8

Cited by 26 publications

(26 citation statements)

References 23 publications

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“…We attribute those past results to the planarization of the as-deposited gold films by the SAMs. These results are of interest to the future study of plasmonic systems using SAMs to achieve gaps with high field enhancements, for example in the area of SERS [1][2][3][4][5][6][7] or nonlinear optics [12][13][14][15][16][17][18][19].…”

Section: Resultsmentioning

confidence: 88%

“…Subwavelength gaps between metal nanostructures can be used to obtain high field localization for applications including surface-enhanced Raman scattering [1][2][3][4][5][6][7] and nonlinear optics [8][9][10][11]. There is great interest in determining the ultimate field enhancement, and how this is limited by nonlocal [12][13][14][15][16][17][18][19] and quantum effects [11,[20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of surface roughness on self-assembled monolayer plasmonic ruler in nonlocal regime

Hajisalem¹,

Qiao²,

Gelfand³

et al. 2014

Opt. Express

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Recently, self-assembled monolayers (SAMs) have been used for plasmonic rulers to measure the nonlocal influence on the Au nanoparticle - metal film resonance wavelength shift and probe the ultimate field enhancement. Here we examine the influence of surface roughness on this plasmonic ruler in the nonlocal regime by comparing plasmonic resonance shifts for as-deposited and for ultra-flat Au films. It is shown that the resonance shift is larger for ultra-flat films, suggesting that there is not the saturation from nonlocal effects previously reported for the spacer range from 0.7 nm to 1.6 nm. We attribute the previously reported saturation to the planarization of the as-deposited films by thinner SAMs, as measured here by atomic-force microscopy. This work is of interest both in probing the ultimate limits of plasmonic enhancement with SAMs for applications in Raman and nonlinear optics, but also in the study of SAMs planarization as a function surface roughness.

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Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Effect of surface roughness on self-assembled monolayer plasmonic ruler in nonlocal regime

Hajisalem¹,

Qiao²,

Gelfand³

et al. 2014

Opt. Express

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“…The induced strong electromagnetic field energy associated with plasmonic excitation localized in nanosized structures is of considerable interest for its applications in surface-enhanced spectroscopy [3,4] and nano devices [5]. The plasmonic property of a nanostructure depends extremely on its size and geometry, which can be finely engineered to meet different requirements.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Effect of a Nanoshell Dimer with Different Gain Materials

et al. 2014

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Though the plasmonic property for a passive nanoparticle dimer has been studied widely, the performance of a nanoparticle dimer with gain material is still inexplicit to our knowledge. Therefore, in this paper, we focus on the plasmonic effect of a nanoshell dimer, with its core filled with different gain materials, under a polarized plane wave excitation using a three-dimensional finite difference time domain method. It is shown that the gain materials in the core of the nanoshell can compensate the intrinsic absorption of the metal shell, resulting in a local energy enhancement in the junction of the active nanoshell dimer. The physics is supported by the detailed energy distribution of the active nanoshell dimer in each geometry region. It is found that the plasmonic coupling between two active nanoshell particles is more compact than the case of passive ones. The influence of shell thickness on the interaction between two adjacent active nanoshells is also analyzed.

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“…Nanocaphole arrays are extremely simple coupled structures to produce based on colloidal lithography with the potential for use in sensing applications. They have recently been applied for SERS enhancement [22].…”

Section: Introductionmentioning

confidence: 99%

Exploring plasmonic coupling in hole-cap arrays

Schmidt¹,

Frederiksen²,

Bochenkov³

et al. 2016

Nano Online

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The plasmonic coupling between gold caps and holes in thin films was investigated experimentally and through finite-difference time-domain (FDTD) calculations. Sparse colloidal lithography combined with a novel thermal treatment was used to control the vertical spacing between caps and hole arrays and compared to separated arrays of holes or caps. Optical spectroscopy and FDTD simulations reveal strong coupling between the gold caps and both Bloch Wave-surface plasmon polariton (BW-SPP) modes and localized surface plasmon resonance (LSPR)-type resonances in hole arrays when they are in close proximity. The interesting and complex coupling between caps and hole arrays reveals the details of the field distribution for these simple to fabricate structures.

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Plasmonic Coupling Effect in Ag Nanocap–Nanohole Pairs for Surface-Enhanced Raman Scattering

Cited by 26 publications

References 23 publications

Effect of surface roughness on self-assembled monolayer plasmonic ruler in nonlocal regime

Effect of surface roughness on self-assembled monolayer plasmonic ruler in nonlocal regime

Plasmonic Effect of a Nanoshell Dimer with Different Gain Materials

Exploring plasmonic coupling in hole-cap arrays

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