%0 Journal Article
%@ 0003-6951
%A Navarro-Cia, M
%A Natrella, M
%A Dominec, F
%A Delagnes, JC
%A Kuzel, P
%A Mounaix, P
%A Graham, C
%A Renaud, CC
%A Seeds, AJ
%A Mitrofanov, O
%D 2013
%F discovery:1416553
%J APPLIED PHYSICS LETTERS
%N 22
%T Terahertz imaging of sub-wavelength particles with Zenneck surface waves
%U https://discovery.ucl.ac.uk/id/eprint/1416553/
%V 103
%X Impact of sub-wavelength-size dielectric particles on Zenneck surface waves on planar metallic antennas is investigated at terahertz (THz) frequencies with THz near-field probe microscopy. Perturbations of the surface waves show the particle presence, despite its sub-wavelength size. The experimental configuration, which utilizes excitation of surface waves at metallic edges, is suitable for THz imaging of dielectric sub-wavelength size objects. As a proof of concept, the effects of a small strontium titanate rectangular particle and a titanium dioxide sphere on the surface field of a bow-tie antenna are experimentally detected and verified using full-wave simulations.
%Z © 2013 Author(s).. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.