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dc.contributor.authorSparks, W.
dc.contributor.authorHough, J.
dc.contributor.authorKolokolova, L.
dc.contributor.authorGermer, T.A.
dc.contributor.authorChen, F.
dc.contributor.authorDasSarma, S.
dc.contributor.authorDasSarma, P.
dc.contributor.authorRobb, F.T.
dc.contributor.authorManset, N.
dc.contributor.authorReid, I.
dc.contributor.authorMacchetto, F.D.
dc.contributor.authorMartin, W.
dc.date.accessioned2011-06-08T11:56:02Z
dc.date.available2011-06-08T11:56:02Z
dc.date.issued2009
dc.identifier.citationSparks , W , Hough , J , Kolokolova , L , Germer , T A , Chen , F , DasSarma , S , DasSarma , P , Robb , F T , Manset , N , Reid , I , Macchetto , F D & Martin , W 2009 , ' Circular polarization in scattered light as a possible biomarker ' , Journal of Quantitative Spectroscopy and Radiative Transfer , vol. 110 , no. 14-16 , pp. 1771-1779 . https://doi.org/10.1016/j.jqsrt.2009.02.028
dc.identifier.issn0022-4073
dc.identifier.otherPURE: 161314
dc.identifier.otherPURE UUID: 0396a217-87c0-4861-8e39-9dc4230864cf
dc.identifier.otherdspace: 2299/5925
dc.identifier.otherScopus: 67649363940
dc.identifier.urihttp://hdl.handle.net/2299/5925
dc.descriptionOriginal article can be found at : http://www.sciencedirect.com/ Copyright Elsevier
dc.description.abstractBiological molecules exhibit homochirality and are optically active. Therefore, it is possible that the scattering of light by biological molecules might result in a macroscopic signature in the form of circular polarization. If this is the case, then circular polarization spectroscopy, which may be utilized in remote sensing, can offer a powerful indicator of the presence of a universal biosignature, namely homochirality. Here, we describe laboratory experiments designed to investigate this idea. We focus on photosynthetic microorganisms, and also show results from macroscopic vegetation and control minerals. In the microorganisms, we find unambiguous circular polarization associated with electronic absorption bands of the photosynthetic apparatus. Macroscopic vegetation yields a stronger and more complex signature while the control minerals produce low-levels of circular polarization unrelated to their spectra. We propose a heuristic explanation of our results, which is that the polarization is produced by circular dichroism in the material after the light has undergone its last scattering event. The results are encouraging for the use of circular polarization spectroscopy in remote sensing of a generic biomarker from space or the ground.en
dc.language.isoeng
dc.relation.ispartofJournal of Quantitative Spectroscopy and Radiative Transfer
dc.rightsOpen
dc.subjectcircular polarization
dc.subjectbiomarker
dc.subjectastrobiology
dc.titleCircular polarization in scattered light as a possible biomarkeren
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2009
rioxxterms.versionofrecordhttps://doi.org/10.1016/j.jqsrt.2009.02.028
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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