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dc.contributor.authorMatheson, Andrew B.
dc.contributor.authorOgugu, Edward B.
dc.contributor.authorGillanders, Ross N.
dc.contributor.authorTurnbull, Graham A.
dc.contributor.authorHenderson, Robert
dc.identifier.citationMatheson , A B , Ogugu , E B , Gillanders , R N , Turnbull , G A & Henderson , R 2023 , ' Fluorescence lifetime imaging for explosive detection ' , Optics Letters , vol. 48 , no. 22 , pp. 6015-6018 .
dc.identifier.otherRIS: urn:861D7EC95ED702FFD96776D993CBE45B
dc.identifier.otherORCID: /0000-0002-8825-3234/work/146965255
dc.descriptionFunding: Engineering and Physical Sciences Research Council (EP/R005257/1, EP/T00097X/1); NATO Science for Peace & Security Programme (MYP G5355); Commonwealth Scholarship Commission; Foreign, Commonwealth and Development Office.en
dc.description.abstractIn this Letter, a time-resolved 120 × 128 pixel single-photon avalanche diode (SPAD) sensor is used in conjunction with an array of organic semiconductor films as a means of detecting the presence of explosive vapors. Using the spatial and temporal resolution of the sensor, both fluorescence intensity and fluorescence lifetime can be monitored on a pixel-by-pixel basis for each of the polymer films arranged in a 2 × 2 grid. This represents a significant improvement on similar systems demonstrated in the past, which either offer spatial resolution without the temporal resolution required to monitor lifetime or offer only a single bulk measurement of lifetime and intensity without the spatial resolution. The potential of the sensing system is demonstrated using vapors of DNT, and differing responses for each of the four polymer films is observed. This system has clear applications as the basis of a portable chemical fingerprinting tool with applications in humanitarian demining and security.
dc.relation.ispartofOptics Lettersen
dc.subjectDiode lasersen
dc.subjectFluorescence lifetime imagingen
dc.subjectImaging systemsen
dc.subjectPhoton countingen
dc.subjectSingle-photon avalanche diodesen
dc.subjectSpatial resolutionen
dc.subjectQC Physicsen
dc.titleFluorescence lifetime imaging for explosive detectionen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Energy Ethicsen
dc.contributor.institutionUniversity of St Andrews. Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. Organic Semiconductor Centreen
dc.description.statusPeer revieweden

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