Cu/ITO-Coated Uncladded Fiber-Optic Biosensor Based on Surface Plasmon Resonance

被引：31

作者：

Wang, Qi ^{[1
,2
]}

Sun, Bing ^{[1
,2
]}

Hu, Ertao ^{[1
,2
]}

Wei, Wei ^{[1
,2
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Jiangsu, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Microelect, Nanjing 210023, Jiangsu, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2019年 / 31卷 / 14期

关键词：

Optic fiber sensor; surface plasmon resonance; refractive index; double layers of film; OPTICAL-FIBER; SENSITIVITY-ENHANCEMENT; PHOTONIC CRYSTAL; THIN-FILM; SENSOR; LIQUID;

D O I：

10.1109/LPT.2019.2908288

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A surface plasmon resonance (SPR)-based fiber-optic biosensor with bi-layers (copper, ITO) has been experimentally proposed and demonstrated. Benefitting from its high refractive index and unique optoelectronic properties, the additional ITO layer immobilized onto the Cu film can significantly improve its sensing performance. A sensitivity of 4583.4 nm/RIU (refractive index unit) was achieved, with a large enhancement in the figure of merit (FOM) by 61.6% compared with the sample without the ITO layer. Furthermore, the proposed SPR-based biosensor exhibits a bovine serum albumin (BSA) solution concentration sensitivity of 1.907 nm/(mg/mL) and a detection limit of 5.70x10(-7) mg/mL. Significantly, this biosensor shows a sub-microliter-dose sensitivity, with promising biochemical applications such as DNA hybridization, cancer screenings, medicine examination, and environmental engineering.

引用

页码：1159 / 1162

页数：4

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