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highly sensitive polarimetric sensor based on fano resonance for dna hybridization detection
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نویسنده
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zhao xiang ,huang tianye ,zeng shuwen ,song chaolong ,cheng zhuo ,wu xu ,huang pan ,pan jianxing ,wu yiheng ,shum perry ping
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 3 - صفحه:769 -781
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چکیده
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Surface plasmon resonance (spr) sensor based on reflectivity measurement has been widely studied for its convenient detection, high sensitivity, and real-time functions. however, the resonance curves of spr reflectivity spectrum are broad that lead to a low detection limit (dl) and low detection resolution. in this work, fano resonance (fr), which has an asymmetrical sharp and narrow resonance peak, is demonstrated here to improve the dl and resolution of the plasmonic sensor. more importantly, a three-point method is employed here to analyzed and extract the polarization information of the reflected light by replacing the conventional intensity interrogation method. the sharp signal change of the fano resonance realized by the designed configuration together with the three-point method led to a significantly enhancement on the dl and the resolution of the fr-based sensor up to one order of magnitude comparing to conventional scheme commonly used with the commercial products. thus, the proposed sensor is of great potential for biochemical sensing such as dna detection in terms of measuring the refractive index change at the sensing interface.
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کلیدواژه
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fano resonance ,three-point method ,detection limit ,biochemical sensing
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آدرس
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china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, umr 7252 cnrs/university of limoges, xlim research institute, france, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, china university of geosciences (wuhan), school of mechanical engineering and electronic information, china, nanyang technological university, center of fiber technology, singapore
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Authors
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