Tunable visual color filter using microfluidic grating

Z.G. Li, Y. Yang, Xuming Zhang, A.Q. Liu, J.B. Zhang, L. Cheng, Z.H. Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review


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.
Original languageEnglish
Pages (from-to)1-7
Number of pages7
Issue number4
Publication statusPublished - 30 Dec 2010


  • Diffraction gratings
  • Light transmission
  • Microfluidics
  • Optical filters
  • Spectrophotometry

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Physical and Theoretical Chemistry
  • General Materials Science
  • Condensed Matter Physics


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