Photonic spin Hall effect-based ultra-sensitive refractive index sensor for haemoglobin sensing applications

被引：26

作者：

Ahlawat, Lokesh ^{[1
]}

Kishor, Kamal ^{[1
]}

Sinha, Ravindra Kumar ^{[1
,2
]}

机构：

[1] Delhi Technol Univ, Ctr Relevance & Excellence Fiber Opt & Opt Commun, Dept Appl Phys, TIFAC, Delhi, India

[2] Gautam Buddha Univ, Sch Biotechnol, Gautam Budh Nagar, Greater Noida 201312, Uttar Pradesh, India

来源：

OPTICS AND LASER TECHNOLOGY | 2024年 / 170卷

关键词：

Photonic spin Hall effect; Refractive index sensor; Surface Plasmon Resonance; Haemoglobin; Spin-orbit coupling; LIGHT; SURFACE;

D O I：

10.1016/j.optlastec.2023.110183

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A highly sensitive Photonic Spin Hall Effect (PSHE)-based layered sensor is proposed which detects changes in refractive index of biological sample. A simple and elegant design measures haemoglobin concentrations using Surface Plasmon Resonance (SPR) effect. It consists of a BK7 prism, a thin gold layer, an analyte layer of haemoglobin and BK7 glass as the substrate. The average angle sensitivity (S-R) has been calculated and found to be 191 degrees/RIU, 208 degrees/RIU and 171 degrees/RIU respectively for low, normal and high haemoglobin concentrations. The Figure of Merit (FOM) for the proposed structure is found to be 896RIU(-1), 812RIU(-1) and 3166RIU(-1) respectively for low, normal and high concentrations of oxygenated haemoglobin.

引用

页数：9

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