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13 - Electrical and Electronic Engineering, Metallurgy and Materials

University of Leeds

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Article title

Absorption-sensitive diffuse reflection imaging of concealed powders using a terahertz quantum cascade laser

Type

D - Journal article

DOI

Title of journal

Optics Express

Article number

Volume number

Issue number

First page of article

5997

ISSN of journal

1094-4087

Year of publication

2008

URL

Number of additional authors

Additional information

AGD-4: This is the first demonstration of absorption-sensitive reflection imaging using a terahertz quantum cascade laser (QCL), providing a practical QCL imaging/spectroscopy methodology that avoids the need for a transmission geometry or for precise (specular) alignment of source/detector. Rigorous back-scattering models were compared, and used, to extract absorption coefficients of concealed powdered samples. The work was supported by Her Majesty’s Government Communication Centre (including funding Dean as a PDRA), for application to sense concealed drugs-of-abuse, and underpinned a subsequent £428k contract from the Home Office Scientific Development Branch (2009–2012), and a 2013 US DTRA award (HDTRA1-14-C-0013, PI:Linfield, $255,671).

Interdisciplinary

Cross-referral requested

Research group

None

Proposed double-weighted

Double-weighted statement

Reserve for a double-weighted output

Non-English

English abstract