dc.contributor.author | Stantchev, RI | |
dc.contributor.author | Phillips, DB | |
dc.contributor.author | Hobson, P | |
dc.contributor.author | Hornett, SM | |
dc.contributor.author | Padgett, MJ | |
dc.contributor.author | Hendry, E | |
dc.date.accessioned | 2017-09-19T13:21:09Z | |
dc.date.issued | 2017-08-17 | |
dc.description.abstract | We demonstrate a form of near-field terahertz (THz) imaging that is compatible with compressed sensing algorithms. By spatially photomodulating THz pulses using a set of shaped binary optical patterns and employing a 6-μm-thick silicon wafer, we are able to reconstruct THz images of an object placed on the exit interface of the wafer. A single-element detector is used to measure the electric field amplitude of transmitted THz radiation for each projected pattern, with the ultra-thin wafer allowing us to access the THz evanescent near fields to achieve a spatial resolution of ∼9 μm (λ∕45 at 0.75 THz). We conclude by experimentally improving the image rate by a factor of ∼3 by undersampling the object with adaptive and compressed sensing algorithms. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) (EP/K041215/1, EP/M01326X/1); H2020 European Research Council (ERC) (TWISTS, 340507); QinetiQ and EPSRC (iCase award 12440575). | en_GB |
dc.identifier.citation | Vol. 4 (8), pp. 989 - 992 | en_GB |
dc.identifier.doi | 10.1364/OPTICA.4.000989 | |
dc.identifier.uri | http://hdl.handle.net/10871/29421 | |
dc.language.iso | en | en_GB |
dc.publisher | Optical Society of America | en_GB |
dc.rights | © 2017 Optical Society of America. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | en_GB |
dc.title | Compressed sensing with near-field THz radiation | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2017-09-19T13:21:09Z | |
dc.identifier.issn | 2334-2536 | |
dc.description | This is the author accepted manuscript. The final version is available from Optical Society of America via the DOI in this record. | en_GB |
dc.identifier.journal | Optica | en_GB |