[1] [1] Krohn DA, MacDougall T, Mendez A. Fiber optic sensors: fundamentals and applications. Bellingham: Spie Press; 2014.10.1117/3.1002910

[2] [2] Gupta BD, Verma R, Srivastava SK. Fiber optic sensors based on plasmonics. World Scientific; 2015.10.1142/9289

[3] [3] Guggenheim JA, Li J, Allen TJ, et al. Ultrasensitive plano-concave optical microresonators for ultrasound sensing. Nat Photonics. 2017;11:714–9. .

[4] [4] Xiong Y, Xu F. Multifunctional integration on optical fiber tips: challenges and opportunities. Adv Photonics. 2020;2: 064001.10.1117/1.AP.2.6.064001

[5] [5] Jia Q, Tang W, Yan W, Qiu M. Fibre tapering using plasmonic microheaters and deformation-induced pull. Light Adv Manufact. 2023;4:25–36.10.37188/lam.2023.005

[6] [6] Zou M, et al. Fiber-tip polymer clamped-beam probe for high-sensitivity nanoforce measurements. Light Sci App. 2021;10:171.10.1038/s41377-021-00611-9

[7] [7] Shang X, et al. Fiber-Integrated force sensor using 3d printed spring-composed Fabry-Perot cavities with a high precision down to tens of piconewton. Adv Mater. 2023;36:2305121.10.1002/adma.202305121

[8] [8] Simin C, Xinggang S, Lei Z, Ning W, Min Q. PDMS-filled micro-spring fabry-perot cavity for temperature sensing. Opt Express. 2023;31:30332–9.10.1364/OE.498537

[9] [9] Ma X, et al. High-sensitivity and fast-response humidity sensor based on a simple fiber-tip interferometer with thin agarose gel coating. J Lightwave Technol. 2023;41:6824–30.10.1109/JLT.2023.3289533

[10] [10] Picelli L, van Veldhoven PJ, Verhagen E, Fiore A. Hybrid electronic–photonic sensors on a fibre tip. Nat Nanotechnol. 2023;18:1162–7.10.1038/s41565-023-01435-x

[11] [11] Chen Y, et al. Nanodiamond-based optical-fiber quantum probe for magnetic field and biological sensing. ACS Sensors. 2022;7:3660–70.10.1021/acssensors.2c00670

[12] [12] Consales M, et al. Metasurface-enhanced lab-on-fiber biosensors. Laser Photonics Rev. 2020;14:2000180.10.1002/lpor.202000180

[13] [13] Sun X, et al. A quasi-3D Fano resonance cavity on optical fiber end-facet for high signal-to-noise ratio dip-and-read surface plasmon sensing. Light Sci App. 2022;3:665–75.

[14] [14] Xiong C, et al. Fiber-tip polymer microcantilever for fast and highly sensitive hydrogen measurement. ACS Appl Mater Interfaces. 2020;12:33163–72.10.1021/acsami.0c06179

[15] [15] Cao S, et al. Two-photon direct laser writing of micro Fabry-Perot cavity on single-mode fiber for refractive index sensing. Opt Express. 2022;30:25536–43.10.1364/OE.464210

[16] [16] Xu Y, et al. Optical refractive index sensors with plasmonic and photonic structures: promising and inconvenient truth. Adv Opt Mater. 2019;7: 1801433.10.1002/adom.201801433

[17] [17] Hajshahvaladi L, Kaatuzian H, Moghaddasi M, Danaie M. Hybridization of surface plasmons and photonic crystal resonators for high-sensitivity and high-resolution sensing applications. Sci Rep. 2022;12:21292.10.1038/s41598-022-25980-y

[18] [18] Chen R, et al. Nonlinearity synergy: an elegant strategy for realizing high-sensitivity and wide-linear-range pressure sensing. Nat Commun. 2023;14:6641.10.1038/s41467-023-42361-9

[19] [19] Lu P, et al. Iontronic pressure sensor with high sensitivity and linear response over a wide pressure range based on soft micropillared electrodes. Sci Bull. 2021;66:1091–100.10.1016/j.scib.2021.02.019

[20] [20] Liang Y, et al. Subradiant dipolar interactions in plasmonic nanoring resonator array for integrated label-free biosensing. ACS Sensors. 2017;2:1796–804.10.1021/acssensors.7b00607

[21] [21] Chauhan M, Kumar Singh V. Review on recent experimental SPR/LSPR based fiber optic analyte sensors. Opt Fiber Technol. 2021;64:102580.10.1016/j.yofte.2021.102580

[22] [22] Zhao Y, Wang P, Lv R, Liu X. Highly sensitive airflow sensor based on Fabry-Perot interferometer and Vernier effect. J Lightwave Technol. 2016;34:5351–6.10.1109/JLT.2016.2615054

[23] [23] Wei T, Han Y, Li Y, Tsai H-L, Xiao H. Temperature-insensitive miniaturized fiber inline Fabry-Perot interferometer for highly sensitive refractive index measurement. Opt Express. 2008;16:5764–9.10.1364/OE.16.005764

[24] [24] Williams JC, Chandrahalim H, Suelzer JS, Usechak NG. Two-photon nanomachining of a micromechanically enhanced optical cavity sensor on an optical fiber tip. Adv Photonics Res. 2022;3:2100359.10.1002/adpr.202100359

[25] [25] Gomes AD, Bartelt H, Frazão O. Optical Vernier effect: recent advances and developments. Laser Photonics Rev. 2021;15: 2000588.10.1002/lpor.202000588

[26] [26] Flannery J, Al Maruf R, Yoon T, Bajcsy M. Fabry-Pérot cavity formed with dielectric metasurfaces in a hollow-core fiber. ACS Photonics. 2017;5:337–41.10.1021/acsphotonics.7b01154

[27] [27] Shaltout AM, Kim J, Boltasseva A, Shalaev VM, Kildishev AV. Ultrathin and multicolour optical cavities with embedded metasurfaces. Nat Commun. 2018;9:2673.10.1038/s41467-018-05034-6

[28] [28] Fu J, Jin Y, He S. Metasurface for constructing a stable high-Q plano-planar open cavity. Adv Opt Mater. 2019;7:1801339.10.1002/adom.201801339

[29] [29] Ossiander M, et al. Metasurface-stabilized optical microcavities. Nat Commun. 2023;14:1114.10.1038/s41467-023-36873-7

[30] [30] Ren H, et al. An achromatic metafiber for focusing and imaging across the entire telecommunication range. Nat Commun. 2022;13:4183.10.1038/s41467-022-31902-3

[31] [31] Zhang L, et al. ‘Plug-and-play’ plasmonic metafibers for ultrafast fibre lasers. Light Adv Manufact. 2022;3:653–64.10.37188/lam.2022.045

[32] [32] Li C, et al. Metafiber transforming arbitrarily structured light. Nat Commun. 2023;14:7222.10.1038/s41467-023-43068-7

[33] [33] Zhang L, et al. Plasmonic metafibers electro-optic modulators. Light Sci App. 2023;12:198.10.1038/s41377-023-01255-7

[34] [34] Luk’yanchuk B, et al. The Fano resonance in plasmonic nanostructures and metamaterials. Nat Mater. 2010;9:707–15.10.1038/nmat2810

[35] [35] Limonov MF, Rybin MV, Poddubny AN, Kivshar YS. Fano resonances in photonics. Nat Photonics. 2017;11:543–54.10.1038/nphoton.2017.142

[36] [36] Gu L, et al. A compact structure for realizing Lorentzian, Fano, and electromagnetically induced transparency resonance lineshapes in a microring resonator. Nanophotonics. 2019;8:841–8.10.1515/nanoph-2018-0229

[37] [37] Cencillo-Abad P, Ou J-Y, Plum E, Zheludev NI. Electro-mechanical light modulator based on controlling the interaction of light with a metasurface. Sci Rep. 2017;7:5405.10.1038/s41598-017-05906-9

[38] [38] Lan G, Wang Y, Ou J-Y. Optimization of metamaterials and metamaterial-microcavity based on deep neural networks. Nanoscale Advances. 2022;4:5137–43.10.1039/D2NA00592A

[39] [39] Auguié B, Barnes WL. Collective resonances in gold nanoparticle arrays. Phys Rev Lett. 2008;101: 143902.10.1103/PhysRevLett.101.143902

[40] [40] Vala M, Ertsgaard CT, Wittenberg NJ, Oh S-H. Plasmonic sensing on symmetric nanohole arrays supporting high-Q hybrid modes and reflection geometry. ACS Sensors. 2019;4:3265–74.10.1021/acssensors.9b01780

[41] [41] Kravets VG, et al. Plasmonic surface lattice resonances: a review of properties and applications. Chem Rev. 2018;118:5912–51.10.1021/acs.chemrev.8b00243

[42] [42] Yi D, et al. Interrogation technique analyses of a hybrid fiber optic sensor based on SPR and MMI. Opt Express. 2020;28:20764–72.10.1364/OE.396374

[43] [43] Gong P, et al. In situ temperature-compensated DNA hybridization detection using a dual-channel optical fiber sensor. Anal Chem. 2021;93:10561–7.10.1021/acs.analchem.1c01660

[44] [44] Xia F, Zhao Y. RI sensing system with high sensitivity and large measurement range using a microfiber MZI and a photonic crystal fiber MZI. Measurement. 2020;156: 107603.10.1016/j.measurement.2020.107603

[45] [45] Liu Z, et al. Refractive index SPR sensor with high sensitivity and wide detection range using tapered silica fiber and photopolymer coating. Opt Express. 2023;31:31768–79.10.1364/OE.497122

[46] [46] Huang H, et al. Effects of substrate on the femtosecond laser-induced damage properties of gold films. Opt Mater. 2018;81:115–21.10.1016/j.optmat.2018.05.013

[47] [47] Gonzalez-Hernandez D, Varapnickas S, Bertoncini A, Liberale C, Malinauskas M. Micro-optics 3D printed via multi-photon laser lithography. Adv Opt Mater. 2022;11:2201701.10.1002/adom.202201701

[48] [48] Scaravilli M, et al. Excitation of bloch surface waves on an optical fiber tip. Adv Opt Mater. 2018;6: 1800477.10.1002/adom.201800477

[49] [49] Herráez JV, Belda R. Refractive indices, densities and excess molar volumes of monoalcohols + water. J Solution Chem. 2006;35:1315–28.10.1007/s10953-006-9059-4

[50] [50] Aydin D, Barnes JA, Loock H-P. In-fiber interferometry sensors for refractive index. Appl Phys Rev. 2023;10: 011307.10.1063/5.0105147

[51] [51] Li Z, et al. Actively switchable beam-steering via hydrophilic/hydrophobic-selective design of water-immersed metasurface. Adv Opt Mater. 2021;9:2100297.10.1002/adom.202100297

[52] [52] Lu J, et al. A Versatile metasurface enabling superwettability for self-cleaning and dynamic color response. Adv Opt Mater. 2021;10:2101781.10.1002/adom.202101781

[53] [53] Li F, et al. Affinity exploration of SARS-CoV-2 RBD variants to mAb-functionalized plasmonic metasurfaces for label-free immunoassay boosting. ACS Nano. 2023;17:3383–93.10.1021/acsnano.2c08153

[54] [54] Sun C, et al. Integrated microring spectrometer with in-hardware compressed sensing to break the resolution-bandwidth limit for general continuous spectrum analysis. Laser Photonics Rev. 2023;17:2300291.10.1002/lpor.202300291

[55] [55] Sun C, Yin Y, Chen Z, et al. Tunable narrow-band single-channel add-drop integrated optical filter with ultrawide FSR. PhotoniX. 2022;3:12. .