Surface-enhanced Raman scattering as a higher-order Raman process

Mueller, Niclas S.; Heeg, Sebastian; Reich, Stéphanie

doi:10.1103/physreva.94.023813

Cited by 31 publications

(62 citation statements)

References 52 publications

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“…Eq. (12). 3D simulations show that enhancement predicted by the analytical model, also appears in the presence of retardation effects.…”

Section: Introductionmentioning

confidence: 80%

“…We manage to obtain a simple expression for the steady-state of the Stokes field amplitude, Eq. (12). On this expression we explain why such an enhancement should emerge.…”

Section: Introductionmentioning

confidence: 88%

“…|g and |e represents the ground and excited states for the auxiliary QE.Ĥ R is a standard Hamiltonian for a Raman process, described, for instance, in the Refs. [11][12][13] . A similar form ofĤ R could have also been derived 43 from a radiation pressure like interaction 47,48 .…”

Section: Hamiltonian and Equation Of Motionmentioning

confidence: 99%

“…In an efficient conversion, nonlinear process takes place between plasmonic excitations of different frequencies due to the localization [9][10][11] . Recent studies show that MNPs with plasmon resonances at both excitation and Stokes frequencies (double resonance) provide better enhancement factors for Raman intensities [11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

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Silent enhancement of SERS signal without increasing hot spot intensities

et al. 2018

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Plasmonic nanostructures enhance nonlinear response, such as surface enhanced Raman scattering (SERS), by localizing the incident field into hot spots. The localized hot spot field can be enhanced even further when linear Fano resonances (FR) take place in a double resonance scheme. However, hot spot enhancement is limited with the modification of the vibrational modes, the break-down of the molecule and the tunnelling regime. Here, we present a method which can circumvent these limitations. Our analytical model and solutions of 3D Maxwell equations show that: enhancement due to the localized field can be multiplied by a factor of 10 2 to 10 3 . Moreover, this can be performed without increasing the hot spot intensity which also avoids the modification of the Raman modes. Unlike linear Fano resonances, we create a path interference in the nonlinear response. We demonstrate on a single equation that enhancement takes place due to cancellation of the contributing terms in the denominator of the SERS response.arXiv:1709.09230v3 [physics.optics]

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“…Eq. (12). 3D simulations show that enhancement predicted by the analytical model, also appears in the presence of retardation effects.…”

Section: Introductionmentioning

confidence: 80%

“…We manage to obtain a simple expression for the steady-state of the Stokes field amplitude, Eq. (12). On this expression we explain why such an enhancement should emerge.…”

Section: Introductionmentioning

confidence: 88%

Section: Hamiltonian and Equation Of Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Silent enhancement of SERS signal without increasing hot spot intensities

et al. 2018

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“…The effective

boldA true(r, t true)

that interacts with electrons can be expressed by ref.

\begin{array}{c} center & A (r, t) true \underset{boldk}{= \sum} (1 + r_{p}) normalcos θ \sqrt{\frac{ℏ}{2 V ω_{k} ϵ_{0}}} ε_{∥} \\ center & \times (b_{k} e^{i true(k \cdot r - ω_{k} t true)} + b_{k}^{normal†} e^{- i true(k \cdot r - ω_{k} t true)}) \end{array}

where

ε_{∥}, k, ω_{k}

, and V are, respectively, the unit vector of polarization of the photon in the direction parallel to graphene, wave vector of the photon, frequency of the photon, and volume occupied by the photon.

b_{k}^{normal†} true(b_{k} true)

is the creation (annihilation) operator of photon.…”

Section: The Quantum Description Of Surface Plasmon Excitation By Lightmentioning

confidence: 99%

Quantum Description of Surface Plasmon Excitation by Light in Graphene

Ukhtary

Saito

2018

Physica Status Solidi (b)

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The enhanced absorption probability of gigahertz and terahertz electromagnetic wave in monolayer graphene, sandwiched by the dielectric materials, up to 100% has been shown in our previous works by solving the classical Maxwell equation with transfer matrix method. In this paper, we show by a quantum description of the phenomena that the origin of the enhanced optical absorption is equivalent to the excitation of surface plasmon. The interaction between a photon with a surface plasmon is calculated, and the excitation probability of surface plasmon can be obtained by the Fermi golden rule, which can be compared with the optical spectrum that is calculated by the Maxwell equation. The calculated results show that both the intraband single‐particle excitation of electron and collective excitation or surface plasmon contribute to optical absorption.

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Optical nanoantenna for beamed and surface‐enhanced Raman spectroscopy

Awasthi

Goel

Agarwal

et al. 2020

J Raman Spectroscopy

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Optical nanoantenna is a key component in plasmonic circuitry, which can receive or transmit an electromagnetic field in the near field of an object (nanomaterials). It has wide range of applications including surface‐enhanced Raman scattering (SERS), photocatalytic reactions, remote SERS, solar cell, plasmonic nanoscopy, and quantum plasmonics. The main challenges in optical nanoantenna research include both fundamental understanding of the underlying physics and issues related to fabrication of low cost, high throughput nanostructures beyond the diffraction limit. The nanoscale feature size of optical antennas limits our ability to design, manufacture, and characterize their resonant behavior. This review investigates the fabrication methods and SERS applications of optical nanoantenna.

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Surface-enhanced Raman scattering as a higher-order Raman process

Cited by 31 publications

References 52 publications

Silent enhancement of SERS signal without increasing hot spot intensities

Silent enhancement of SERS signal without increasing hot spot intensities

Quantum Description of Surface Plasmon Excitation by Light in Graphene

Optical nanoantenna for beamed and surface‐enhanced Raman spectroscopy

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