【摘 要】
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A symmetric plasmonic structure consisting of metal-insulator metal waveguide,groove and slot cavities is studied,which supports double Fano resonances deriving
【机 构】
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State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Post
论文部分内容阅读
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 800nm/RIU and a figure of merit of 3150,which may have important applications in switches,sensors,and nonlinear devices.
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