title: Investigation on the second part of the electromagnetic SERS enhancement and resulting fabrication strategies of anisotropic plasmonic arrays.
abstract: 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.
authors.affiliation: Institute of Physical Chemistry, Friedrich-Schiller-University Jena, Helmholtzweg 4, 07743 Jena, Germany.
authors.forename: Dana
authors.initials: D
authors.lastname: Cialla
authors.forename: Jörg
authors.initials: J
authors.lastname: Petschulat
authors.forename: Uwe
authors.initials: U
authors.lastname: Hübner
authors.forename: Henrik
authors.initials: H
authors.lastname: Schneidewind
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeisberger
authors.forename: Roland
authors.initials: R
authors.lastname: Mattheis
authors.forename: Thomas
authors.initials: T
authors.lastname: Pertsch
authors.forename: Michael
authors.initials: M
authors.lastname: Schmitt
authors.forename: Robert
authors.initials: R
authors.lastname: Möller
authors.forename: Jürgen
authors.initials: J
authors.lastname: Popp