Abstract
The multi-wavelength optical switch based on an all-dielectric metastructure consisting of four asymmetric semi-circular rings was designed and analyzed in this paper. Four Fano resonance modes, which can be explained by bound states in the continuum (BIC) theory, are excited in our structure with a maximum Q-factor of about 2 450 and a modulation depth close to 100%. By changing the polarization direction of the incident light, the transmission amplitude of Fano resonances can get effectively modulated. Based on this tuning property, the metastructure can achieve a multi-wavelength optical switch in the near-infrared region (900–980 nm) and the maximum extinction ratio can reach 38.3 dB. In addition, the results indicate that the Fano resonances are sensitive to the changes in the refractive index. The sensitivity (S) and the figure of merit (FOM) are 197 nm/RIU and 492 RIU−1. The proposed metastructure has promising potential in applications such as optical switches, sensors, modulators and lasers.
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CHEN Y K, WANG Y. Electrically tunable toroidal Fano resonances of symmetry-breaking dielectric metasurfaces using graphene in the infrared region[J]. Journal of optics, 2022, 24(4): 044012.
JIANG H, HAN Z H. Spectral stability of bound state in the continuum resonances due to thermal effect and the application as efficient thermo-optic modulators[J]. Optics communications, 2022, 515: 128216.
HAN Z H, CAI Y J. All-optical self-switching with ultralow incident laser intensity assisted by a bound state in the continuum[J]. Optics letters, 2021, 46(3): 524–527.
XING J J, LI H, YU S L, et al. Multiple Fano resonances driven by bound states in the continuum in an all-dielectric nanoarrays system[J]. AIP advances, 2023, 13(3): 035212.
YE Y C, YU S L, LI H, et al. Triple Fano resonances metasurface and its extension for multi-channel ultra-narrow band absorber[J]. Results in physics, 2022, 42: 106025.
ZHANG Y B, LIU W W, LI Z C, et al. High-quality-factor multiple Fano resonances for refractive index sensing[J]. Optics letters, 2018, 43(8): 1842–1845.
FAN K, SHADRIVOV I V, PADILLA W J. Dynamic bound states in the continuum[J]. Optica, 2019, 6(2): 169–173.
GARMON S, NOBA K, ORDONEZ G, et al. Non-Markovian dynamics revealed at a bound state in the continuum[J]. Physical review A, 2019, 99(1): 010102.
ZHAO H N, FAN X Y, WEI X, et al. All-dielectric metastructure based on multiple Fano resonances with high sensitivity[J]. Optics communications, 2023, 530: 129193.
YU S L, LI H, WANG Y S, et al. Multiple Fano resonance excitation of all-dielectric nanoholes cuboid arrays in near infrared region[J]. Results in physics, 2021, 28: 104569.
YANG L, YU S L, LI H, et al. Multiple Fano resonances excitation on all-dielectric nanohole arrays metasurfaces[J]. Optics express, 2021, 29(10): 14905–14916.
BI L P, FAN X Y, LI C C, et al. Multiple Fano resonances on the metastructure of all-dielectric nanopore arrays excited by breaking two-different-dimensional symmetries[J]. Heliyon, 2023, 9(1): e12990.
WANG D D, FAN X Y, FANG W J, et al. Excitation of multiple Fano resonances on all-dielectric nanoparticle arrays[J]. Optics express, 2023, 31(6): 10805–10819.
SHI Y, YU S L, LI H, et al. Ultra-high quality factor resonances in a pinwheel-shaped all-dielectric metasurface based on bound states in the continuum[J]. IEEE photonics journal, 2023, 15(2): 1–7.
FAN H J, LI J, SUN Y H, et al. Asymmetric cross metasurfaces with multiple resonances governed by bound states in the continuum[J]. Materials, 2023, 16(6): 2227.
LI H, YU S L, YANG L, et al. High Q-factor multi-Fano resonances in all-dielectric double square hollow metamaterials[J]. Optics and laser technology, 2021, 140: 107072.
WANG Y S, HU Z H, ZHAO T G, et al. High Q-factor Fano resonances on permittivity-asymmetric dielectric meta-surfaces[C]//Proceedings of Nanophotonics and Micro/Nano Optics VII, October 10–12, 2021, Nantong, China. New York: SPIE, 2021, 11903: 139–145.
JIANG X Q, BAO J L, SUN X D. Multiwavelength optical switch based on controlling the Fermi energy of graphene[J]. Physical review applied, 2018, 9(4): 044026.
PALIK E D. Handbook of optical constants of solids[M]. New York: Academic Press, 1985: 547–569.
WANG W D, ZHENG L, LIU Y J, et al. High-quality-factor multiple Fano resonances in free-standing all-dielectric nanodisk dimers for applications[J]. Optik, 2020, 207: 163815.
XU L, ZANGENEH K K, HUANG L J, et al. Dynamic nonlinear image tuning through magnetic dipole quasi-BIC ultrathin resonators[J]. Advanced science, 2019, 6(15): 1802119.
LI J, MA T. Magnetic toroidal dipole resonances with high quality factor in all-dielectric metamaterial[J]. Optics communications, 2022, 507: 127621.
NIU Q L, ZHU Y Q. Research on control of optical switch based on tetramer structure[J]. Transducer and microsystem technologies, 2023, 42(3): 40–44.
ZHANG L, DONG Z G, WANG Y M, et al. Dynamically configurable hybridization of plasmon modes in nanoring dimer arrays[J]. Nanoscale, 2015, 7(28): 12018–12022.
HE J N, WANG J Q, DING P, et al. Optical switching based on polarization tunable plasmon-induced transparency in disk/rod hybrid metasurfaces[J]. Plasmonics, 2015, 10: 1115–1121.
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This work has been supported by the Cultivation Plan for Young Scholars in Universities of Shandong Province (No.2021RC085), the Natural Foundation of Shandong Province (Nos.ZR2021MF053, ZR2022MF253, ZR2021MF070 and ZR2022MF305), and the Open Fund of the Key State Laboratory (BUPT, IPOC) (No.IPOC2021B07).
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Cao, S., Fan, X., Fang, W. et al. A high-performance multi-wavelength optical switch based on multiple Fano resonances in an all-dielectric metastructure. Optoelectron. Lett. 20, 193–199 (2024). https://doi.org/10.1007/s11801-024-3147-9
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DOI: https://doi.org/10.1007/s11801-024-3147-9