Refractive Plasmonic Sensor Based on Fano Resonances in an Optical System
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Abstract
A symmetric plasmonic structure consisting of metal–insulator–metal waveguide, groove and slot cavities is studied, which supports double Fano resonances deriving from two different mechanisms. One of the Fano resonances originates from the interference between the resonances of groove and slot cavities, and the other comes from the interference between slot cavities. The spectral line shapes and the peaks of the double Fano resonances can be modulated by changing the length of the slot cavities and the height of the groove. Furthermore, the wavelength of the resonance peak has a linear relationship with the length of the slot cavities. The proposed plasmonic nanosensor possesses a sensitivity of 800 nm/RIU and a figure of merit of 3150, which may have important applications in switches, sensors, and nonlinear devices. -
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References
[1] Barnes W L, Dereux A and Tw E 2003 Nature 424 824 doi: 10.1038/nature01937[2] Shang C, Chen Z, Wang L L, Zhao Y F, Duan G Y and Yu L 2014 Chin. Phys. Lett. 31 114202 doi: 10.1088/0256-307X/31/11/114202[3] Zhang X Y, Wang L L, Chen Z, Cui L N, Shang C, Zhao Y F, Duan G Y, Liu J B and Yu L 2015 Chin. Phys. Lett. 32 054209 doi: 10.1088/0256-307X/32/5/054209[4] Yun B, Hu G, Zhang R and Cui Y 2016 J. Opt. 18 055002 doi: 10.1088/2040-8978/18/5/055002[5] Chen J, Li Z, Zou Y, Deng Z, Xiao J and Gong Q 2013 Plasmonics 8 1627 doi: 10.1007/s11468-013-9580-4[6] Lassiter J B, Sobhani H, Fan J A, Kundu J, Capasso F, Nordlander P and Halas N J 2010 Nano Lett. 10 3184 doi: 10.1021/nl102108u[7] Hao F, Sonnefraud Y, Van D P, Maier S A, Halas N J and Nordlander P 2008 Nano Lett. 8 3983 doi: 10.1021/nl802509r[8] Qi J, Chen Z, Jing C, Li Y, Qiang W, Xu J and Suan Q 2014 Opt. Express 22 14688 doi: 10.1364/OE.22.014688[9] Chen Z Q, Qi J W, Chen J, Li Y D, Hao Z Q, Lu W Q, Xu J J and Sun Q 2013 Chin. Phys. Lett. 30 057301 doi: 10.1088/0256-307X/30/5/057301[10] Shegai T, Chen S, Miljkovi V D, Zengin G, Johansson P and Kall M 2011 Nat. Commun. 2 481 doi: 10.1038/ncomms1490[11] Wen K, Hu Y, Chen L, Zhou J, Lei L and Guo Z 2015 Plasmonics 10 27 doi: 10.1007/s11468-014-9772-6[12] Lu H, Liu X, Mao D, Gong Y and Wang G 2011 Opt. Lett. 36 3233 doi: 10.1364/OL.36.003233[13] Lu H, Liu X, Mao D and Wang G 2012 Opt. Lett. 37 3780 doi: 10.1364/OL.37.003780[14] Collin S, Vincent G, Haidar R, Bardou N, Rommeluere S and Pelouard J L 2010 Phys. Rev. Lett. 104 027401 doi: 10.1103/PhysRevLett.104.027401[15] Zhang C X, Nie Y H and Liang J Q 2008 Chin. Phys. B 17 2670 doi: 10.1088/1674-1056/17/7/052[16] Fan J A, Wu C, Bao K, Bao J, Bardhan R, Halas N J, Manoharan V N, Nordlander P, Shvets G and Capasso F 2010 Science 328 1135 doi: 10.1126/science.1187949[17] Lassiter J B, Sobhani H, Knight M W, Mielczarek W S, Nordlander P and Halas N J 2012 Nano Lett. 12 1058 doi: 10.1021/nl204303d[18] Verellen N, Sonnefraud Y, Sobhani H, Hao F Moshchalkov V V, Dorpe P V, Nordlander P and Maier S A 2009 Nano Lett. 9 1663 doi: 10.1021/nl9001876[19] Miroshnichenko A E, Flach S and Kivshar Y S 2010 Rev. Mod. Phys. 82 2257 doi: 10.1103/RevModPhys.82.2257[20] Chen J, Li Z, Zhang X, Xiao J and Gong Q 2013 Sci. Rep. 3 1451 doi: 10.1038/srep01451[21] Guevara M L L D, Claro F and Orellana P A 2003 Phys. Rev. B 67 195335 doi: 10.1103/PhysRevB.67.195335[22] Wu C, Khanikaev A B and Shvets G 2011 Phys. Rev. Lett. 106 107403 doi: 10.1103/PhysRevLett.106.107403[23] Eickhoff C, Teichmann M and Weinelt M 2011 Phys. Rev. Lett. 107 176804 doi: 10.1103/PhysRevLett.107.176804[24] Shuai Y, Zhao D, Singh Chadha A, Seo J H, Yang H, Fan S, Ma Z and Zhou W 2013 Appl. Phys. Lett. 103 241106 doi: 10.1063/1.4846475[25] Han Z and Si B 2011 Opt. Express 19 3251 doi: 10.1364/OE.19.003251[26] Becker J, Trügler A, Jakab A, Hohenester U and Sonnnichsen C 2010 Plasmonics 5 161 doi: 10.1007/s11468-010-9130-2[27] Liu N, Weiss T and Mesch M 2010 Nano Lett. 10 1103 doi: 10.1021/nl902621d[28] Li S, Zhang Y, Song X, Wang Y and Yu L 2016 Opt. Express 24 15351 doi: 10.1364/OE.24.015351