Photonics Research, Volume. 11, Issue 12, 2210(2023)
Reflection-type surface lattice resonances in all-metal metasurfaces for refractive index sensing
Fig. 1. Schematics and experimental characterization of the proposed all-metal metasurface. (a) Schematic illustration of the all-metal metasurface and the coupling between the LSPR and the RA. The structural parameters are as follows:
Fig. 2. Experimental and simulated results of the designed metasurface. (a) Measured and (b) numerical simulation reflection spectra of metasurfaces with different meta-atom widths of 200 nm, 250 nm, and 300 nm. Electric field
Fig. 3. RI sensing results of numerical simulation and measurement. (a) Variation of simulated SLR spectra with RI environments. (b) SLR dip positions in the spectra and corresponding calculated RI sensing sensitivity. (c) Measured reflection-type SLR spectra under air (
Fig. 4. Spectra and sensitivities of other metasurfaces. (a) Measured reflection-type SLR spectra in different RI environments and (b) RI sensitivity of the metasurface with
Fig. 5. Experimental results from angular multiplexing with different polarization modes. (a) Measured reflection spectra of the TM beam in the case of different incident angles from 10° to 50° at a 10° interval. (b) Measured reflection spectra of the TE beam with different incident angles from 5° to 25° at a 5° interval. Measured SLR spectra under the different RI conditions of the (c) TM beam and (d) TE beam
Fig. 6. Experimental results from a rectangular array. (a) SEM image of the all-metal metasurface with the rectangular array (
Fig. 7. Measured and simulated spectra and SEM images of metasurfaces with the (a) hexagonal meta-atom, (b) nanohole meta-atom, (c) hexagonal array, and (d) honeycomb array. The above SLR spectra are all excited by
Fig. 8. (a) Theoretical calculation wavelengths of the
Fig. 9. (a) Simulated reflection spectra and (b) SLR dip positions of the metasurface with
Fig. 10. (a), (b) Simulated reflection spectra and SLR dip positions of the Au metasurface under different RI environments. Inset image is the structure diagram with geometric parameters (
Fig. 11. Schematic diagrams of the (a) TM mode incidence and (b) TE mode incidence.
Fig. 12. Normalized electric field
Fig. 13. (a) SEM image of the proposed metasurface with the rectangular array (
Fig. 14. Schematic diagrams of the (a) hexagonal array and (b) honeycomb array.
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Liye Li, Yifan Ouyang, Lijun Ma, Hongshun Sun, Yusa Chen, Meizhang Wu, Zhimei Qi, Wengang Wu, "Reflection-type surface lattice resonances in all-metal metasurfaces for refractive index sensing," Photonics Res. 11, 2210 (2023)
Category: Surface Optics and Plasmonics
Received: Aug. 1, 2023
Accepted: Oct. 15, 2023
Published Online: Nov. 29, 2023
The Author Email: Wengang Wu (wuwg@pku.edu.cn)