Terahertz imaging of sub-wavelength particles with Zenneck surface waves
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
- Institute of Physics of the Academy of Sciences of the Czech Republic
- LOMA, Bordeaux 1 University, CNRS UMR 5798
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.
|Journal||Applied Physics Letters|
|Publication status||Published - 25 Nov 2013|