High enhancement factor of Au nano triangular prism structure for surface enhanced coherent anti-Stokes Raman scattering

Abstract

Coherent anti-Stokes Raman scattering spectroscopy (CARS) is a well-known detecting tool in biosensing and nonlinear spectroscopy. It can provide a non-invasive alternative without the need for exogenous labels, while the enhancement factor for surface plasmon resonances (SPR) are extensively used to increase the local field close to the oscillators and which can obtain high enhancement. In this work, we investigate the enhancement factor of our structure for surface-enhanced coherent anti-Stokes Raman scattering. The absorption spectrum of the structure has been studied, a wide range of absorption has been realized. The enhancement can be as high as over standard CARS. Our design is very useful for improving the enhancement factor of surface-enhanced coherent anti-Stokes Raman scattering.

Surface‐enhanced micro‐CARS mapping of a nanostructured cerium dioxide/aluminum film surface with gold nanoparticle‐bound organic molecules

“…After the first experimental observations and theoretical description, SECARS‐spectroscopy in recent times generates more and more research activities that are shortly summarized in the review papers . These activities, among others, are devoted to studying of peculiarities of SECARS itself, to biomedical applications, to finding the ways to reach a single‐molecule sensitivity, which with SECARS may be achievable for a much broader variety of substances than with classical SERS, due to potentially higher field enhancing factors, and even to investigations of arising possibility to engineer SERS‐active structures delivering the highest gain in the SECARS configuration . But the field of the most interesting SECARS applications opens when the capability of the technique to be employed in femto‐ and picosecond time‐resolved experiments is realized.…”

“…[7][8][9] These activities, among others, are devoted to studying of peculiarities of SECARS itself, [10][11][12][13] to biomedical applications, [14][15][16][17] to finding the ways to reach a single-molecule sensitivity, [15,18,19] which with SECARS may be achievable for a much broader variety of substances than with classical SERS, due to potentially higher field enhancing factors, [9,11] and even to investigations of arising possibility to engineer SERS-active structures delivering the highest gain in the SECARS configuration. [20][21][22] But the field of the most interesting SECARS applications opens when the capability of the technique to be employed in femto-and picosecond time-resolved experiments is realized. This already led to an impressive direct observation of vibrations of a single molecule [19] and of other exciting features of ultrafast SECARS.…”

Enhancement of molecular coherent anti-Stokes Raman scattering with silicon nano-antennas

“…Surfaceenhanced CRS was first demonstrated in 1979 where the coherent anti-Stokes Raman scattering (CARS) signal from liquid benzene was amplified with the help of surface plasmon polaritons supported on a flat Ag film antenna [12]. Subsequent progress on surface-enhanced CRS has focused largely on engineering metallic nanoantennas based on Au and Ag to increase and/or optimize the sensitivity of detection [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. The quest has seen considerable success and single-molecule sensitivity has been demonstrated by multiple groups [28][29][30][31].…”

Geometrical condition for observing Talbot effect in plasmonics infinite metallic groove arrays

“…[10] The unique features of surface plasmon polaritons (SPPs) make them a critical candidate for nanophotonics applications. [11][12][13][14][15] By analogy of SPPs, which are electromagnetic waves propagating along the interface between metal and dielectric, with other electromagnetic waves, we anticipate that SPPs also exhibit periodical revivals. More recently, the formation of revivals in the near field has been explored theoretically [16][17][18][19][20] and experimentally.…”