Terahertz imaging of sub-wavelength particles with Zenneck surface waves

Journal Article · Mon Nov 25 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4836195· OSTI ID:22253937

Natrella, M.; Graham, C.; Renaud, C. C.; Seeds, A. J.; Dominec, F.; Delagnes, J. C.

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.

• OSTI ID: 22253937
• Journal Information: Applied Physics Letters, Vol. 103, Issue 22; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTENNAS
DIELECTRIC MATERIALS
EXCITATION
PARTICLES
PERTURBATION THEORY
SIMULATION
STRONTIUM
TITANATES
TITANIUM OXIDES
WAVE PROPAGATION
WAVELENGTHS