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a polarization-independent spr sensor based on photonic crystal fiber for low ri detection
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نویسنده
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wang jianshuai ,pei li ,wu liangying ,wang ji ,ruan zuliang ,zheng jingjing
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 2 - صفحه:327 -333
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چکیده
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A surface plasmon resonance (spr) sensor based on a photonic crystal fiber (pcf) is proposed for low refractive index (ri) detection. the core of pcf is formed by two-layer air walls and either layer is composed of six identical sector rings with negative curvature. plasmonic material gold (au) is coated on the external cladding surface. finite element method (fem) is applied to investigate the performance of the spr sensor. results show that the sensor is independent of polarization due to the coincident coupling properties of the two polarized modes. additionally, in low ri ranging from 1.20 to 1.33, the sensor keeps a high spectral sensitivity with an average value of 7738 nm/riu. when ri varies from 1.32 to 1.33, the resolution reaches to its maximum of 8.3 × 10−6. the proposed sensor shows much significance in low ri detection, which is promising in real-time measurement for medical, water pollution, and humidity.
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کلیدواژه
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fiber sensor ,surface plasmon resonance ,photonic crystal fiber ,low refractive index
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آدرس
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key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china, key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china, key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china, key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china, key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china, key laboratory of all optical network and advanced telecommunication network of ministry of education, beijing jiaotong university, institute of lightwave technology, china
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Authors
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