A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging

Li, C. , Grant, J. , Wang, J. and Cumming, D.S. (2013) A Nipkow disk integrated with Fresnel lenses for terahertz single pixel imaging. Optics Express, 21(21), pp. 24452-24459. (doi: 10.1364/OE.21.024452)

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We present a novel Nipkow disk design for terahertz (THz) single pixel imaging applications. A 100 mm high resistivity (ρ≈3k-10k Ω·cm) silicon wafer was used for the disk on which a spiral array of twelve 16-level binary Fresnel lenses were fabricated using photolithography and a dry-etch process. The implementation of Fresnel lenses on the Nipkow disk increases the THz signal transmission compared to the conventional pinhole-based Nipkow disk by more than 12 times thus a THz source with lower power or a THz detector with lower detectivity can be used. Due to the focusing capability of the lenses, a pixel resolution better than 0.5 mm is in principle achievable. To demonstrate the concept, a single pixel imaging system operating at 2.52 THz is described.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Li, Dr Chong and Cumming, Professor David and Wang, Dr Jue and Grant, Dr James
Authors: Li, C., Grant, J., Wang, J., and Cumming, D.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN (Online):1094-4087
Copyright Holders:Copyright © 2013 Optical Society of America
First Published:First published in Optics Express 21(21):24452-24459
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
552421Monolithic Resonant TeraHertz DetectorsDavid CummingEngineering & Physical Sciences Research Council (EPSRC)EP/I017461/1ENG - ENGINEERING ELECTRONICS & NANO ENG