A Plasmonic Refractive-Index Sensor Based Multiple Fano Resonance Multiplexing in Slot-Cavity Resonant System
نویسندگان
چکیده
Abstract In this paper, a sub-wavelength metal-insulator-metal (MIM) waveguide structure is proposed by using cross-shape rectangular cavity, of which wings are coupled with two cavities. Firstly, cavity placed between the input and output MIM waveguides. According to mutual interference bright dark modes, three Fano resonant peaks generated. Secondly, adding on left wing cross shaped one, five asymmetric resonance obtained. Thirdly, six achieved after another right wing. Finally, finite-difference-time-domain (FDTD) method multimode coupled-mode theory (MICMT) used simulate analyze plasmonic system, respectively. The highest sensitivity 1 000nm/RIU achieved.
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ژورنال
عنوان ژورنال: Photonic Sensors
سال: 2021
ISSN: ['2190-7439', '1674-9251']
DOI: https://doi.org/10.1007/s13320-021-0631-8