Grating-based metasurfaces for ultra-narrow near-infrared bandpass filtering with wide out-of-band suppression
Taozheng Hu,
Zheng Yang,
Zicheng Yang
et al.
Abstract:Here, we present a straightforward strategy for designing silicon grating-based metasurfaces tailored for narrow near-infrared bandpass filtering. By selecting appropriate structural parameters for the grating and including periodic groove perturbations within each grating slit, transverse guided mode resonances (GMRs) propagating perpendicular and parallel to the grating slit are created to provide wide out-of-band suppression and high-Q filter responses, respectively. The destructive and constructive interfe… Show more
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