THz s-SNOM imaging of logarithmic spiral antennas
Résumé
Probing the near-field of photonic components at sub-wavelength scale is of high interest to improve the design of future THz devices. We report on the THz near-field imaging of logarithmic spiral antennas by scattering-type scanning near-field optical microscopy (s-SNOM). Our results demonstrate that the s-SNOM technique allows to access the electric field distribution on the arms of an antenna and reveals non-trivial features at the center of the component.