Numerical simulation of field enhancement property of surface enhanced Raman spectroscopy active substrates

Hui Wen Cheng, Yiming Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this work, we computationally study surface enhanced Raman spectroscopy (SERS) active substrates and their application in the detection of Rhodamine 6G (R6G). To examine the electromagnetic enhancement, we first apply the finite-difference time domain (FDTD) algorithm to analyze the SERS active substrates by solving a set of Maxwell's equations (Ampere's Law and Faraday's Law) in differential form. The local field enhancements are simulated in the visible regime with the wavelength of 633 nm. Through the three-dimensional (3D) FDTD simulation, we find that the roughened surface have relatively larger field enhancement following the Beckmann-Kirchhoff theory and can be achieved by hydrothermal treatment. Also the enhancements with different shape of nanoparticle are tested and obtained which are nanoparticle, gold nanocage and gold/silver alloy for spherical, cubic and pyramidical shapes. The results show that the enhancement of spherical and cubic shapes can be much improved by nanocage and gold/siliver alloy structures.

Original languageEnglish
Title of host publicationProceedings of the International Conference of Computational Methods in Sciences and Engineering 2010, ICCMSE 2010
EditorsTheodore E. Simos, Theodore E. Simos, George Maroulis, Theodore E. Simos, Theodore E. Simos
PublisherAmerican Institute of Physics Inc.
Pages110-119
Number of pages10
ISBN (Electronic)9780735412828
DOIs
StatePublished - 17 Feb 2015
EventInternational Conference of Computational Methods in Sciences and Engineering 2010, ICCMSE 2010 - Psalidi, Kos, Greece
Duration: 3 Oct 20108 Oct 2010

Publication series

NameAIP Conference Proceedings
Volume1642
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Conference of Computational Methods in Sciences and Engineering 2010, ICCMSE 2010
CountryGreece
CityPsalidi, Kos
Period3/10/108/10/10

Keywords

  • electromagnetic field
  • finite-difference time domain (FDTD) algorithm
  • gold nanoparticle
  • hydrothermal treatment
  • Raman spectra
  • roughened surface
  • surface enhanced Raman spectroscopy

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