Design of tunable microfluidic optical filter with resonant waveguide-grating

Guohui Xiao

doi:10.1117/12.3003928

18 December 2023 Design of tunable microfluidic optical filter with resonant waveguide-grating

Guohui Xiao

Proceedings Volume 12961, AOPC 2023: Nanophotonics ; 1296105 (2023) https://doi.org/10.1117/12.3003928
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Guided-mode resonance (GMR) filters have attracted lots of attention due to their potential applications in filters, semiconductor lasers, modulators and bio-sensors. GMR filters are composed of few dielectric layers and gratings. Compared to the traditional multilayer filters, they are easily fabricated and extremely suitable for the free-space filter as well as the application for the coupling of light from free space to waveguide mode. However, the deviation between the refractive indices of the guiding waveguide and grating is very small because the refractive indices of the polymers are in the range of 1.40 to 1.69, which lagged the design of the polymer GMR filter with a high performance. Here, we proposed novel methods to design polymer GMR reflection filters with single-layer channel for microfluidic application. The side-bands (side-lobe) of the filter are minimized. We also demonstrate the spectrum responses of a tunable microfluidic optical filter with different fluids introduced into the micro-channels based on multilayer polymers. These methods would pave a road to the tunable microfluidic GMR filters.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Guohui Xiao "Design of tunable microfluidic optical filter with resonant waveguide-grating", Proc. SPIE 12961, AOPC 2023: Nanophotonics , 1296105 (18 December 2023); https://doi.org/10.1117/12.3003928

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