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Terahertz probe for spectroscopy of sub-wavelength objects

Mitrofanov, O; Renaud, CC; Seeds, AJ; (2012) Terahertz probe for spectroscopy of sub-wavelength objects. Optics Express , 20 (6) 6197 - 6202. 10.1364/OE.20.006197. Green and gold open access

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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.

Type:Article
Title:Terahertz probe for spectroscopy of sub-wavelength objects
Open access status:An open access publication. A version is also available from UCL Discovery.
DOI:10.1364/OE.20.006197
Publisher version:http://dx.doi.org/10.1364/OE.20.006197
Language:English
Additional information:© 2012 Optical Society of America. PubMed ID: 22418501
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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