title: Terahertz probe for spectroscopy of sub-wavelength objects.
abstract: A system of two probes is designed for terahertz (THz) time-domain spectroscopy of sub-wavelength size objects. A twin-needle probe confines broadband THz pulses spatially by means of surface plasmon waves to a sub-wavelength spot smaller than 10 microns. The confined pulses are detected within the near-field zone of the twin-needle probe by a sub-wavelength aperture probe. The system allows THz spectroscopy to be applied to single micrometer-size objects in the 1-2.5THz region.
authors.affiliation: Department of Electronic & Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK. o.mitrofanov@ucl.ac.uk
authors.forename: Oleg
authors.initials: O
authors.lastname: Mitrofanov
authors.forename: Cyril C
authors.initials: CC
authors.lastname: Renaud
authors.forename: Alwyn J
authors.initials: AJ
authors.lastname: Seeds
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055068:Terahertz Spectroscopy / Q000295:instrumentation*; D014159:Transducers