Terahertz imaging of sub-wavelength particles with Zenneck surface waves

Miguel Navarro-Cia, M. Natrella, F. Dominec, J. C. Delagnes, P. Kužel, P. Mounaix, C. Graham, C. C. Renaud, A. J. Seeds, O. Mitrofanov

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11 Citations (Scopus)
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Abstract

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.

Original languageEnglish
Article number221103
JournalApplied Physics Letters
Volume103
Issue number22
DOIs
Publication statusPublished - 25 Nov 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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