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highly sensitive biochemical sensor based on two-layer dielectric loaded plasmonic microring resonator
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نویسنده
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ma tao ,yuan jinhui ,sun lei ,li feng ,kang zhe ,yan binbin ,sang xinzhu ,wang kuiru ,wu qiang ,liu heng ,gao jinhui ,yu chongxiu
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منبع
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plasmonics - 2017 - دوره : 12 - شماره : 5 - صفحه:1417 -1424
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چکیده
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In this paper, we propose and design a highly sensitive optical biochemical sensor based on two-layer dielectric loaded surface plasmon polariton waveguide (tdlsppw)-based microring resonator (mrr). by optimizing the structure parameters, the propagation length of the proposed waveguide is ~126 μm, which is about 3 times of that of the polymer dielectric loaded surface plasmon polariton waveguide (dlsppw) reported. it is demonstrated that the tdlsppw-based mrr is operated at the under-coupling state, along with the quality factor (q) of 541.2 and extinction ratio (er) of 12.2 db. moreover, the q and er are much more sensitive to the structure parameters of the waveguide, including the waveguide width w, total thickness t, and coupling gap w gap, compared to the low refractive index (ri) layer thickness t 2. the simulation results on the biochemical ri sensing show that the sensitivities of 408.7 and 276.4 nm/riu for glucose concentration in urine and chemical gases can be achieved, respectively. it is believed that the proposed sensor has potential applications in photonic-integrated biochemical sensing.
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کلیدواژه
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surface plasmon resonant ,optical waveguide ,dielectric-loaded plasmonic waveguide
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آدرس
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beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china. henan normal university, college of electronic and electrical engineering, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china. the hong kong polytechnic university, photonics research center, department of electronic and information engineering, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china, the hong kong polytechnic university, photonics research center, department of electronic and information engineering, china, the hong kong polytechnic university, photonics research center, department of electronic and information engineering, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china, dublin institute of technology, photonics research center, school of electronic and communications engineering, ireland. northumbria university, department of physics and electrical engineering, uk, henan normal university, college of electronic and electrical engineering, china, henan normal university, college of electronic and electrical engineering, china, beijing university of posts and telecommunications (bupt), state key laboratory of information photonics and optical communications, china
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Authors
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