Microchannel-based plasmonic refractive index sensor for low refractive index detection

Haque Emranul; Hossain Md Anwar; Namihira Yoshinori; Ahmed Feroz

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Microchannel-based plasmonic refractive index sensor for low refractive index detection

机译：基于微通道的等离子体折射率传感器，用于低折射率检测

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A microchannel incorporated photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor for detection of low refractive index (RI) at near-infrared wavelength is presented in this paper. To attain a simple and practically feasible mechanism, plasmonic material gold (Au) and sensing medium are placed outside the fiber. A thin layer of TiO(2 )is employed as an adhesive layer to strongly attach the Au with the silica glass. In the sensing range of 1.22 to 1.37, maximum sensitivities of 51,000 nm/RIU (RI unit) and 1872 RIU-1 are obtained with resolutions of 1.96 x 10(-6) and 9.09 x 10(-6) RIUs using wavelength and amplitude interrogation methods, respectively. To the best of the authors' knowledge, the obtained maximum wavelength sensitivity and resolution are the highest among reported PCF-based SPR sensors to date. The sensor also exhibits a maximum figure of merit of 566. Therefore, the proposed sensor would be an excellent candidate for a wide range of RI detection with higher accuracy for applications such as pharmaceutical inspection and leakage monitoring, bio-sensing, and other low RI analytes. (C) 2019 Optical Society of America

机译：本文提出了一种用于检测近红外波长的低折射率（RI）的微通道掺入的光子晶体（PCF）的表面等离子体谐振（SPR）传感器。为了获得简单且实际上可行的机制，等离子体材料金（AU）和传感介质放置在纤维外部。使用薄的TiO（2）作为粘合剂层，以用二氧化硅玻璃强烈地连接Au。在1.22至1.37的感测范围内，使用波长和幅度的分辨率获得51,000nm / Riu（RI单元）和1872 ri-1的最大敏感性分别审讯方法。据作者所知，所获得的最大波长灵敏度和分辨率是迄今为止报告的PCF的SPR传感器中最高。该传感器还具有566的最大优点。因此，所提出的传感器是各种RI检测的优异候选者，具有更高的应用，诸如药物检验和泄漏监测，生物传感等低ri的应用更高分析物。（c）2019年光学学会

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来源
《Applied optics》 |2019年第6期|共8页
作者
Haque Emranul; Hossain Md Anwar; Namihira Yoshinori; Ahmed Feroz;
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作者单位

Independent Univ Dept Elect &

Elect Engn Bangladesh IUB Dhaka Bangladesh;

Green Univ Bangladesh Dept Elect &

Elect Engn Dhaka Bangladesh;

Univ Ryukyus Fac Engn Okinawa Japan;

Independent Univ Dept Elect &

Elect Engn Bangladesh IUB Dhaka Bangladesh;

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Microchannel-based plasmonic refractive index sensor for low refractive index detection

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