Advanced

Electromagnetic field enhancement in TERS configurations

Yang, Zhilin; Aizpurua, Javier and Xu, Hongxing LU (2009) In Journal of Raman Spectroscopy 40(10). p.1343-1348
Abstract
We use three-dimensional finite-difference time domain (3D-FDTD) simulations to investigate the field enhancement properties of tip-enhanced Raman scattering (TIERS) in order to find optimal geometric parameters of the metal tip and the metal substrate under certain excitation wavelengths with side illumination. The simulation results show that plasmon coupling effects between the metal tip and the metal substrate play the key role in TIERS enhancement, and the enhancement drops dramatically as the distance between the tip and the substrate increases. The spatial resolution of TIERS is mainly dependent on the radius of curvature of the tip end. A sharp tip with a small radius can dramatically increase the spatial resolution of TERS.... (More)
We use three-dimensional finite-difference time domain (3D-FDTD) simulations to investigate the field enhancement properties of tip-enhanced Raman scattering (TIERS) in order to find optimal geometric parameters of the metal tip and the metal substrate under certain excitation wavelengths with side illumination. The simulation results show that plasmon coupling effects between the metal tip and the metal substrate play the key role in TIERS enhancement, and the enhancement drops dramatically as the distance between the tip and the substrate increases. The spatial resolution of TIERS is mainly dependent on the radius of curvature of the tip end. A sharp tip with a small radius can dramatically increase the spatial resolution of TERS. Increasing the tip-substrate distance or changing the metallic substrate into a dielectric substrate lowers the spatial resolution. The TERS enhancement dependence on the incident angle and polarization, the size of tip, as well as the composition of the substrate is also discussed in detail. Copyright (C) 2009 John Wiley & Sons, Ltd. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electromagnetic field enhancement, (FDTD), tip-enhanced Raman spectroscopy (TERS), finite difference time domain
in
Journal of Raman Spectroscopy
volume
40
issue
10
pages
1343 - 1348
publisher
John Wiley & Sons
external identifiers
  • wos:000271514500004
  • scopus:70350139720
ISSN
1097-4555
DOI
10.1002/jrs.2429
language
English
LU publication?
yes
id
61598391-d5c2-4052-b565-9fb261fef39e (old id 1520031)
date added to LUP
2009-12-28 10:33:49
date last changed
2017-12-10 04:00:17
@article{61598391-d5c2-4052-b565-9fb261fef39e,
  abstract     = {We use three-dimensional finite-difference time domain (3D-FDTD) simulations to investigate the field enhancement properties of tip-enhanced Raman scattering (TIERS) in order to find optimal geometric parameters of the metal tip and the metal substrate under certain excitation wavelengths with side illumination. The simulation results show that plasmon coupling effects between the metal tip and the metal substrate play the key role in TIERS enhancement, and the enhancement drops dramatically as the distance between the tip and the substrate increases. The spatial resolution of TIERS is mainly dependent on the radius of curvature of the tip end. A sharp tip with a small radius can dramatically increase the spatial resolution of TERS. Increasing the tip-substrate distance or changing the metallic substrate into a dielectric substrate lowers the spatial resolution. The TERS enhancement dependence on the incident angle and polarization, the size of tip, as well as the composition of the substrate is also discussed in detail. Copyright (C) 2009 John Wiley & Sons, Ltd.},
  author       = {Yang, Zhilin and Aizpurua, Javier and Xu, Hongxing},
  issn         = {1097-4555},
  keyword      = {electromagnetic field enhancement,(FDTD),tip-enhanced Raman spectroscopy (TERS),finite difference time domain},
  language     = {eng},
  number       = {10},
  pages        = {1343--1348},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Raman Spectroscopy},
  title        = {Electromagnetic field enhancement in TERS configurations},
  url          = {http://dx.doi.org/10.1002/jrs.2429},
  volume       = {40},
  year         = {2009},
}