2018 (v1)
Publication
A novel scattering-type near-field optical microscopy (s-SNOM) system based on a terahertz (THz) quantum cascade laser operating in self-detection mode is employed to probe a resonant phonon-polariton mode of a thin topological insulator flake (Bi2Te2.2Se0.8). Background-free near-field imaging with nanoscale spatial resolution is demonstrated.
Uploaded on: April 14, 2023