NAVARRA-CIA, M.; NATRELLA, M.; DOMINEC, F.; DELAGNES, Jean-Christophe; KUZEL, P.; MOUNAIX, Patrick; GRAHAM, C.; RENAUD, C. C.; SEEDS, A.J.; MITROFANOV, O.

doi:10.1063/1.4836195

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NAVARRA-CIA, M.
Optical and Semiconductor Devices Group, Department of Electrical and Electronic Engineering [OSDG, DEEE]
Centre for Plasmonics and Metamaterials [CPM]
Centre of Terahertz Science and Engineering [CTSE]
Department of Electronic and Electrical Engineering [DEEE]

NATRELLA, M.
Department of Electronic and Electrical Engineering [DEEE]

DOMINEC, F.
Institute of Physics

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Applied Physics Letters. 2013, vol. 103, n° 22, p. 221103

American Institute of Physics

Résumé en anglais

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.< Réduire

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Terahertz imaging of sub-wavelength particles with Zenneck surface waves

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