title: A modified transmission tip-enhanced Raman scattering (TERS) setup provides access to opaque samples.
abstract: The combination of scanning probe microscopy and Raman spectroscopy enables chemical characterization of surfaces at highest spatial resolution. This so-called tip-enhanced Raman scattering (TERS) can be employed for a variety of samples where a label-free characterization or identification of constituents on the nanometer scale is pursued. Present TERS setup geometries are always a compromise for specific dedicated applications and show different advantages and disadvantages: Transmission back-reflection setups, when using immersion objectives with a high numerical aperture, intrinsically provide the highest collection efficiency but cannot be applied for opaque samples. Those samples demand upright setups, at the cost of lower collection efficiency, even though very efficient systems using a parabolic mirror for illumination and collection have been demonstrated. In this contribution it is demonstrated that the incorporation of a dichroic mirror to a transmission TERS setup provides easy access to opaque samples without further modification of the setup.
authors: IPHT-Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany.
authors: Tanja
authors: T
authors: Deckert-Gaudig
authors: Marc
authors: M
authors: Richter
authors: Detlef
authors: D
authors: Knebel
authors: Torsten
authors: T
authors: Jähnke
authors: Tilo
authors: T
authors: Jankowski
authors: Erik
authors: E
authors: Stock
authors: Volker
authors: V
authors: Deckert