Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Impact of optical in-plane anisotropy on near-field phonon polariton spectroscopy
Schneider, S.; Seidel, J.; Grafström, S.; Eng, L. M.; Winnerl, S.; Stehr, D.; Helm, M.;
To examine the influence of optical anisotropy on the near-field signal measured in a scattering-type scanning near-field optical microscope, we excite optically uniaxial LiNbO3 close to a phonon resonance at a wavelength of 13 µm in the infrared regime using a tunable free-electron laser. This allows us to excite a phonon polariton resonance in the coupled tip-sample system. We find that the resonance shows a clear dependence on the orientation of the optical axis of the birefringent crystal.
  • Applied Physics Letters 90(2007), 143101

Publ.-Id: 9081 - Permalink