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

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1039/C7LC00259A
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Name affiliation
  1. National Research Council of Canada. Nanotechnology
FormatText, Article
Journal titleLab on a Chip
ISSN1473-0197
1473-0189
Volume17
Issue11
Pages1988–1995
Abstract
We 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
Peer reviewedYes
NPARC number23002567
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