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Investigation on the Second Part of the Electromagnetic SERS Enhancement and Resulting Fabrication Strategies of Anisotropic Plasmonic Arrays
Author(s) -
Cialla Dana,
Petschulat Jörg,
Hübner Uwe,
Schneidewind Henrik,
Zeisberger Matthias,
Mattheis Roland,
Pertsch Thomas,
Schmitt Michael,
Möller Robert,
Popp Jürgen
Publication year - 2010
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200901009
Subject(s) - plasmon , raman scattering , raman spectroscopy , materials science , surface plasmon , surface plasmon polariton , optoelectronics , excitation , fabrication , electromagnetic field , nanophotonics , optics , physics , medicine , quantum mechanics , pathology , alternative medicine
In general, the electromagnetic mechanism is understood as the strongest contribution to the overall surface‐enhanced Raman spectroscopy (SERS) enhancement. Due to the excitation of surface plasmons, a strong electromagnetic field is induced at the interfaces of a metallic nanoparticle leading to a drastic enhancement of the Raman scattering cross‐section. Furthermore, the Raman scattered light expierences an emission enhancement due to the plasmon resonances of the nanoantennas. Herein, this second part of the electromagnetic enhancement phenomenon is investigated for different Raman bands of crystal violet by utilizing the anisotropic plasmonic character of gold nanorhomb SERS arrays. We aim at evaluating the effects of localized and propagating surface plasmon polariton modes as well as their combination on the scattered SERS intensity. From that point of view, design and fabrication strategies towards the fabrication of SERS arrays for excitation wavelengths in the visible and near‐infrared (NIR) spectral region can be given, also using a double‐resonant electromagnetic enhancement.