CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Fano Resonance Based on Multimode Interference in Symmetric Plasmonic Structures and its Applications in Plasmonic Nanosensors |
CHEN Zong-Qiang, QI Ji-Wei, CHEN Jing, LI Yu-Dong, HAO Zhi-Qiang, LU Wen-Qiang, XU Jing-Jun, SUN Qian** |
MOE Key Laboratory of Weak Light Nonlinear Photonics, Tianjin Key Laboratory of Photonics Material and Technology, School of Physics, Nankai University, Tianjin 300071
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Cite this article: |
CHEN Zong-Qiang, QI Ji-Wei, CHEN Jing et al 2013 Chin. Phys. Lett. 30 057301 |
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Abstract A novel symmetric plasmonic structure consisting of a metal-insulator-metal waveguide and a rectangular cavity is proposed to investigate Fano resonance performance by adjusting the size of the structure. The Fano resonance originates from the interference between a local quadrupolar and a broad spectral line in the rectangular cavity. The tuning of the Fano profile is realized by changing the size of the rectangular cavity. The nanostructure is expected to work as an excellent plasmonic sensor with a high sensitivity of about 530 nm/RIU and a figure of merit of about 650.
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Received: 28 January 2013
Published: 31 May 2013
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PACS: |
73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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71.36.+c
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(Polaritons (including photon-phonon and photon-magnon interactions))
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07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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42.79.Fm
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(Reflectors, beam splitters, and deflectors)
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