Electromagnetic field enhancement in TERS configurations
(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:
https://lup.lub.lu.se/record/1520031
- author
- Yang, Zhilin ; Aizpurua, Javier and Xu, Hongxing LU
- organization
- publishing date
- 2009
- 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 Inc.
- 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
- 2016-04-01 13:09:08
- date last changed
- 2022-03-21 08:50:01
@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}}, keywords = {{electromagnetic field enhancement; (FDTD); tip-enhanced Raman spectroscopy (TERS); finite difference time domain}}, language = {{eng}}, number = {{10}}, pages = {{1343--1348}}, publisher = {{John Wiley & Sons Inc.}}, series = {{Journal of Raman Spectroscopy}}, title = {{Electromagnetic field enhancement in TERS configurations}}, url = {{http://dx.doi.org/10.1002/jrs.2429}}, doi = {{10.1002/jrs.2429}}, volume = {{40}}, year = {{2009}}, }