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Title: Tunable visual color filter using microfluidic grating
Authors: Li, ZG
Yang, Y
Zhang, X 
Liu, AQ
Zhang, JB
Cheng, L
Li, ZH
Keywords: Diffraction gratings
Light transmission
Optical filters
Issue Date: 30-Dec-2010
Publisher: American Institute of Physics
Source: Biomicrofluidics, 30 Dec. 2010, v. 4. no. 4, 043013, p. 1-7 How to cite?
Journal: Biomicrofluidics 
Abstract: This paper reports a tunable visual color filter based on a microfluidic transmission grating. The grating lines are formed by the microflows in an array of evenly spaced straight microchannels. In experimental study, the transmission of white light measures a shift of visual color from red to blue in the zeroth order diffraction in response to a change of the refractive index from 1.3290 to 1.3782 in the microflows. The merit of large tunability of transmission peak (Δλ = 408 nm) makes this grating potential for various applications in biological and chemical measurements, such as space- and time-resolving micropattern spectrophotometers and separation of the fluorescence from the excitation.
ISSN: 1932-1058 (online)
DOI: 10.1063/1.3491469
Rights: © 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Z.G. Li et al. Biomicrofluidics 4:4, 043013 (2010) and may be found at
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