https://doi.org/10.1140/epjp/s13360-025-06955-0
Regular Article
All-dielectric metasurfaces with periodic square arrays for optical notch filtering
1
College of Information Engineering, Zhejiang Shuren University, 310015, Hangzhou, China
2
School of Electronic Information Engineering, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, China
3
School of Electrical Engineering and Automation, Nantong University, 226019, Nantong, China
Received:
14
May
2025
Accepted:
11
October
2025
Published online:
3
November
2025
An all-dielectric metasurface based on periodic square arrays of silicon nanoblocks is proposed for optical notch filtering. By tuning the nanoblock size, height, spacing, and unit cell period, strong Mie resonances are excited, enabling precise control of the resonance wavelength. Simulations show sharp resonance features in the transmission spectrum, with high sensitivity to changes in the surrounding refractive index, achieving a maximum sensitivity of 375 nm/RIU. As the refractive index of the sensing medium increases, a distinct red-shift in resonance wavelength is observed, demonstrating excellent refractive index sensing performance. The structure, based on all-dielectric materials, offers low-loss operation and good CMOS compatibility, making it suitable for integrated photonics and sensing applications.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
