A dynamic strategy for wavelength sensing using the diffracted orders of a grating

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DOIResolve DOI: http://doi.org/10.1039/C7LC00259A
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TypeArticle
Journal titleLab on a Chip
ISSN1473-0197
1473-0189
Volume17
Issue11
Pages19881995
AbstractWe propose a strategy for real time multicolour detection of light emitting particles under flow conditions, using the diffracted orders of a grating. The method relies on the fact that the spatial (angular/linear) separation between the orders of a diffraction grating is a wavelength dependent quantity. Thus, the difference in arrival times at a fixed detector for neighbouring orders produced by a moving, light-emitting particle can be used as a wavelength sensing mechanism. We demonstrate this functionality using a prototype PDMS microfluidic device that incorporates a focusing transmission grating. A key attribute of this approach is that it requires only a single sensitive detector, such as a photomultiplier tube, in contrast to many conventional approaches which require multiple sensitive detectors or a detector array.
Publication date
PublisherRoyal Society of Chemistry
LanguageEnglish
AffiliationNanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number23002567
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Record identifier8a6d1faf-00c5-4827-8916-6922178e1697
Record created2017-11-30
Record modified2017-11-30
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