Optical System of the Hyper-spectral Imager for the Underwater Environment and Targets Monitoring

Lei, 于磊 Yu; Ming-ming, 徐明明 Xu; Jie-xiang, 陈结祥 Chen; Hui, 薛辉 Xue

doi:10.3788/gzxb20184711.1101003

Cited by 4 publications

(1 citation statement)

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“…Optical filters are crucial elements in optical devices and systems. Optical narrow-band filters can selectively allow light with a specific wavelength range to be transmitted, playing an important role in fields such as spectrometers, image sensors, medical cosmetology, body feature extraction, and cancer cell detection [1][2][3][4][5][6]. At present, the main optical filters are prism filters [7], diffraction filters [8], interference filters [9], and surface plasmon filters [10,11].…”

Section: Introductionmentioning

confidence: 99%

Design of a dual-channel narrow band filter based on metasurface

Liu,

Luo

et al. 2023

J. Phys.: Conf. Ser.

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We proposed a dual-channel narrow band filter consisting of top and bottom-distributed Bragg reflectors (DBRs) and a dielectric interlayer inserted with a metasurface. Through the design of the metasurface, the two channels of the filter are guaranteed to exhibit high-quality factors with transmittance beyond 90% and full width at half maximum (FWHM) less than 10 nm. We demonstrate that the central wavelengths of each dual-channel filter can be controlled with a total of 50 nm shifts by only changing the width of the metasurface. Compared with the traditional dual-channel filter, our design is easier to fabricate and more convenient to tune the central wavelength, which is promising for ultracompact optical devices.

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