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Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives
We propose a self-consistent method for the analysis of granular materials at terahertz (THz) frequencies using a quantum cascade laser. The method is designed for signals acquired from a laser feedback interferometer, and applied to non-contact reflection-mode sensing. Our technique is demonstrated...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4813927/ https://www.ncbi.nlm.nih.gov/pubmed/27005629 http://dx.doi.org/10.3390/s16030352 |
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author | Han, She Bertling, Karl Dean, Paul Keeley, James Burnett, Andrew D. Lim, Yah Leng Khanna, Suraj P. Valavanis, Alexander Linfield, Edmund H. Davies, A. Giles Indjin, Dragan Taimre, Thomas Rakić, Aleksandar D. |
author_facet | Han, She Bertling, Karl Dean, Paul Keeley, James Burnett, Andrew D. Lim, Yah Leng Khanna, Suraj P. Valavanis, Alexander Linfield, Edmund H. Davies, A. Giles Indjin, Dragan Taimre, Thomas Rakić, Aleksandar D. |
author_sort | Han, She |
collection | PubMed |
description | We propose a self-consistent method for the analysis of granular materials at terahertz (THz) frequencies using a quantum cascade laser. The method is designed for signals acquired from a laser feedback interferometer, and applied to non-contact reflection-mode sensing. Our technique is demonstrated using three plastic explosives, achieving good agreement with reference measurements obtained by THz time-domain spectroscopy in transmission geometry. The technique described in this study is readily scalable: replacing a single laser with a small laser array, with individual lasers operating at different frequencies will enable unambiguous identification of select materials. This paves the way towards non-contact, reflection-mode analysis and identification of granular materials at THz frequencies using quantum cascade lasers. |
format | Online Article Text |
id | pubmed-4813927 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-48139272016-04-06 Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives Han, She Bertling, Karl Dean, Paul Keeley, James Burnett, Andrew D. Lim, Yah Leng Khanna, Suraj P. Valavanis, Alexander Linfield, Edmund H. Davies, A. Giles Indjin, Dragan Taimre, Thomas Rakić, Aleksandar D. Sensors (Basel) Article We propose a self-consistent method for the analysis of granular materials at terahertz (THz) frequencies using a quantum cascade laser. The method is designed for signals acquired from a laser feedback interferometer, and applied to non-contact reflection-mode sensing. Our technique is demonstrated using three plastic explosives, achieving good agreement with reference measurements obtained by THz time-domain spectroscopy in transmission geometry. The technique described in this study is readily scalable: replacing a single laser with a small laser array, with individual lasers operating at different frequencies will enable unambiguous identification of select materials. This paves the way towards non-contact, reflection-mode analysis and identification of granular materials at THz frequencies using quantum cascade lasers. MDPI 2016-03-09 /pmc/articles/PMC4813927/ /pubmed/27005629 http://dx.doi.org/10.3390/s16030352 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Han, She Bertling, Karl Dean, Paul Keeley, James Burnett, Andrew D. Lim, Yah Leng Khanna, Suraj P. Valavanis, Alexander Linfield, Edmund H. Davies, A. Giles Indjin, Dragan Taimre, Thomas Rakić, Aleksandar D. Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title | Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title_full | Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title_fullStr | Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title_full_unstemmed | Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title_short | Laser Feedback Interferometry as a Tool for Analysis of Granular Materials at Terahertz Frequencies: Towards Imaging and Identification of Plastic Explosives |
title_sort | laser feedback interferometry as a tool for analysis of granular materials at terahertz frequencies: towards imaging and identification of plastic explosives |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4813927/ https://www.ncbi.nlm.nih.gov/pubmed/27005629 http://dx.doi.org/10.3390/s16030352 |
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