A dynamic strategy for wavelength sensing using the diffracted orders of a grating
| Autor: | A. Melnyk, Lawrence Lam, Ray G. DeCorby, Robert Fedosejevs, Seyed M. Azmayesh-Fard, T. W. Allen |
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| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Photomultiplier Physics::Instrumentation and Detectors Microfluidics Biomedical Engineering Physics::Optics Bioengineering 02 engineering and technology Grating 01 natural sciences Biochemistry law.invention Optics law Blazed grating Diffraction grating Physics business.industry 010401 analytical chemistry Detector General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Wavelength Optoelectronics 0210 nano-technology business |
| Zdroj: | Lab on a chip. 17(11) |
| ISSN: | 1473-0189 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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