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coupled mode demonstration of slow-light plasmonic sensor based on metasurface at near-infrared region
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نویسنده
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cheng dong ,yu panlong ,zhu lizhi ,yu xinyu ,tang xiangdong ,zhan shiping ,gao yongyi ,nie guozheng
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 5 - صفحه:1389 -1394
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چکیده
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In this paper, we theoretically and numerically reported a dual plasmon-induced transparency and the relevant sensing property in a multi-cross metasurface by the coupled mode analysis. a phase coupling model was established to characterize the optical response of this plasmonic sensor. it was found that the transparency windows were sensitive to the resonance mode of each metal strip, which was well demonstrated by the theoretical model. both the sensing property and the slow light in this structure were discussed. a high figure of merit of 223 and sensitivity of 850 nm/riu were achieved. in addition, the 1170-nm near-infrared light can be slowed down by nearly two order of magnitude with group delay of 0.45 ps in this sensor. these results provide guidance for light-matter interaction-enhanced slow-light sensor and integrated optical circuit design.
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کلیدواژه
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coupled mode theory ,plasmonic sensor ,plasmon-induced transparency ,metasurface ,slow light
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آدرس
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hunan university, college of electrical and information engineering, china, hunan university of science and technology, department of physics and electronic science, china, hunan university of science and technology, department of physics and electronic science, china, hunan university of science and technology, department of physics and electronic science, china, hunan university, college of electrical and information engineering, china, hunan university of science and technology, department of physics and electronic science, china, hunan university of science and technology, department of physics and electronic science, china, hunan university of science and technology, department of physics and electronic science, china. hunan university of commerce, college of mathematics and statistics, china
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Authors
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