[1] [1] HSU C W, ZHEN B, LEE J, et al. Observation of trapped light within the radiation continuum［J］. Nature, 2013, 499(7457): 188-191.

[2] [2] HSU C W, ZHEN B, STONE A D, et al. Bound states in the continuum［J］. Nature Reviews Materials, 2016, 1(9): 16048.

[3] [3] AZZAM S I, KILDISHEV A V. Photonic bound states in the continuum: From basics to applications［J］. Advanced Optical Materials, 2020, 9(1): 2001469.

[4] [4] SADRIEVA Z F, SINEV I S, KOSHELEV K L, et al. Transition from optical bound states in the continuum to leaky resonances: Role of substrate and roughness［J］. ACS Photonics, 2017, 4(4): 723-727.

[5] [5] DOELEMAN H M, MONTICONE F, HOLLANDER W D, et al. Experimental observation of a polarization vortex at an optical bound state in the continuum［J］. Nature Photonics, 2018, 12(7): 397-401.

[6] [6] POLTNIK Y, PELEG O, DREISOW F, et al. Experimental observation of optical bound states in the continuum［J］. Physical Review Letters, 2011, 107(18): 183901.

[7] [7] YU Z J, XI X, MA J W, et al. Photonic integrated circuits with bound states in the continuum［J］. Optica, 2019, 6(10): 1342-1348.

[8] [8] AZZAM S I, SHALAEV V M, BOLTASSEVA A, et al. Formation of bound states in the continuum in hybrid plasmonic-photonic systems［J］. Physical Review Letters, 121(25): 253901.

[9] [9] MARINICA D C, BORISOV A G, SHABANOV S V. Bound states in the continuum in photonics［J］. Physical Review Letters, 2008, 100(18): 183902.

[10] [10] ZHEN B, HSU C W, LU L, et al. Topological nature of optical bound states in the continuum［J］. Physical Review Letters, 2014, 113(25): 257401.

[11] [11] MINKOV M, WILLIAMSON A D, XIAO M, et al. Zero-index bound states in the continuum［J］. Physical Review Letters, 2018, 121(26): 263901.

[12] [12] ZHAO X G, CHEN C X, KAJ K, et al. Terahertz investigation of bound states in the continuum of metallic metasurfaces［J］. Optica, 2020, 7(11): 1548-1554.

[13] [13] KUPRIIANOV A S, XU Y, SAYANSKIY A, et al. Metasurface engineering through bound states in the continuum［J］. Physical Review Applied, 2019, 12(1): 014024.

[14] [14] ABUJETAS D R, HOOF N V, HUURNE S T, et al. Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces［J］. Optica, 2019, 6(8): 996-1001.

[15] [15] FRIEDRICH H, WINTGEN D. Interfering resonances and bound states in the continuum［J］. Physical Review, 1985, A 32(6): 3231-3242.

[16] [16] CONG L, SINGH R. Symmetry-protected dual bound states in the continuum in metamaterials［J］. Advanced Optical Materials, 2019, 7(13): 1900383.

[17] [17] HE Y, GUO G, FENG T, et al. Toroidal dipole bound states in the continuum［J］. Physical Review, 2018, B98(16): 161112.

[18] [18] LI S Y, ZHOU C B, LIU T T, et al. Symmetry-protected bound states in the continuum supported by all-dielectric metasurfaces［J］. Physical Review, 2019, A100(6): 063803.

[19] [19] FAN K, SHADRIVOV I V, PADOLLA W J, et al. Dynamic bound states in the continuum［J］. Optica, 2019, 6(2): 446-454.

[20] [20] KODIGALA A, LEPEIT T, GU Q, et al. Lasing action from photonic bound states in continuum［J］. Nature, 2017, 541(7636): 196-199.

[21] [21] HAN S, CONG L Q, SRIVASTAVA Y K, et al. All-dielectric active terahertz photonics driven by bound states in the continuum［J］. Advanced Materials, 2019, 31(37): 1901921.

[22] [22] HA S T, FU Y H, EMANI N K, et al. Directional lasing in resonant semiconductor nanoantenna arrays［J］. Nature Nanotechnology, 2018, 13(11): 1042-1047.

[23] [23] LIU Z J, XU Y, LIN Y, et al. High-Q quasibound states in the continuum for nonlinear metasurfaces［J］. Physical Review Letters, 2019, 123(25): 253901.

[24] [24] MURAI S, ABUJETAS D R, CASTELLANOS G W, et al. Bound states in the continuum in the visible emerging from out-of-plane magnetic dipoles［J］. ACS Photonics, 2020, 7(8): 2204-2210.

[25] [25] ABUJETAS D R, BARREDA , MORENO F, et al. High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum［J］. Laser Photonics Reviews, 2021, 15(1): 2000263.

[26] [26] LUO X, LI X J, HONG Z, et al. Excitation of high Q toroidal dipole resonance in an all-dielectric metasurface［J］. Optical Materials Express, 2020, 10(2): 358-368.

[27] [27] HUANG C, ZHANG C, XIAO S, et al. Ultrafast control of vortex microlasers［J］. Science, 2020, 367(6481): 1018-1021.

[28] [28] CARLETTI L, KOSHELEV K, ANGELIS C D, et al. Giant nonlinear response at the nanoscale driven by bound states in the continuum［J］. Physical Review Letters, 2018, 121(3): 033903.

[29] [29] YESIKOY F, ARVELO E R, JAHANI Y, et al. Ultrasensitive hyperspectral imaging and biodetection enabled by dielectric metasurfaces［J］. Nature Photonics, 2019, 13(6): 390-396.

[30] [30] TITTL A, LEITIS A, LIU M K, et al. Imaging-based molecular barcoding with pixelated dielectric metasurfaces［J］. Science, 2018, 360(6393): 1105-1109.

[31] [31] SRIVASTAVA Y K, AKO R T, GUPTA M, et al. Terahertz sensing of 7nm dielectric film with bound states in the continuum metasurfaces［J］. Applied Physics Letters, 2019, 115(15): 151105.

[32] [32] WANG Y L, HAN Z H, DU Y, et al. Ultrasensitive terahertz sensing with high-Q toroidal dipole resonance governed by bound states in the continuum in all-dielectric metasurface［J］. Nanophotonics, 2021, 10(4): 1295-1307.

[33] [33] ZHOU C B, LI S Y, WANG Y, et al. Multiple toroidal dipole Fano resonances of asymmetric dielectric nanohole arrays［J］. Physical Review, 2019, B100(19): 195306.

[34] [34] WANG Z H, CHEN L L, HONG Z, et al, Analogue of electromagnetically induced transparency with ultra-narrow bandwidth in a silicon terahertz metasurface［J］. Optical Materials Express, 2021, 11(7): 1943-1952.

[35] [35] LIU Y H, LUO Y, JIN X Y, et al. High-Q Fano resonances in asymmetric and symmetric all-dielectric metasurfaces［J］. Plasmonics, 2017, 12(5): 1431-1438.

[36] [36] ZHOU C B. The study of Fano resonance in all-dielectric nanostructures and their applications［D］. Wuhan: Huazhong University of Science and Technology, 2019: 16-18(in Chinese).

[37] [37] MA T, HUANG Q P, HE H C, et al. All-dielectric metamaterial analogue of electromagnetically induced transparency and its sensing application in terahertz range［J］. Optica Express, 2019, 12(27): 16624-16634.

[38] [38] GALLI M, PORTALUPI S L, BELOTTI M, et al. Light scattering and Fano resonances in high-Q photonic crystal nanocavities［J］. Applied Physics Letters, 2009, 94(7): 071101.

[39] [39] WANG X F, LI S Y, ZHOU C B. Polarization-independent toroidal dipole resonances driven by symmetry-protected BIC in ultraviolet region［J］. Optical Express, 2020, 28(8): 11983-11989.

[40] [40] SAVINOV V, FEDOTOV V A, ZHELUDEV N I, et al. Toroidal dipolar excitation and macroscopic electromagnetic properties of metamaterials［J］. Physical Review, 2014, B89(20): 205112.

[41] [41] GAN X, SHIUE R J, GAO Y. High-contrast electrooptic modulation of a photonic crystal nanocavity by electrical gating of graphene［J］. Nano Letters, 2013, 13(2): 691-696.

[42] [42] ZHOU C B, LIU G Q, BAN G X, et al. Tunable Fano resonator using multilayer graphene in the near-infrared region［J］. Applied Physical Letters, 2018, 112(10): 101904.

[43] [43] QIU X Z. The study of silicon-based all-dielectric metasurface and light emitters［D］.Wuhan: Huazhong University of Science and Technology, 2019: 23-26(in Chinese).

[44] [44] KOSHELEV K, LEPESHOV S, LIU M, et al. Asymmetric metasurfaces with high-Q resonances governed by bound states in the continuum［J］. Physical Review Letters, 2018, 121(19): 193903.