THz s-SNOM imaging of logarithmic spiral antennas

C. Santos , Louis Thomas (1) , Théo Hannotte (1, 2) , Melanie Lavancier (1) , Sophie Eliet (1, 3) , Jean-Francois Lampin (1, 2) , Romain Peretti (1, 2)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 PHOTONIQUE THZ - IEMN - Photonique THz - IEMN
3 PCMP - IEMN - Plateforme de Caractérisation Multi-Physiques - IEMN

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.

Mots clés: near-field scanning optical microscopy; optical microscopy; spiral antennas

Domaines: Sciences de l'ingénieur [physics]; Optique / photonique

C. Santos, Louis Thomas, Théo Hannotte, Melanie Lavancier, Sophie Eliet, et al.. THz s-SNOM imaging of logarithmic spiral antennas. 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567111⟩. ⟨hal-03467373⟩