Highly sensitive refractive index sensor based on Bloch surface waves with lithium niobate film

被引：0
|
作者：
Daohan Ge
Yujie Zhou
Jiakang Shi
Liqiang Zhang
Shining Zhu
机构：
[1] Jiangsu University,Institute of Intelligent Flexible Mechatronics, School of Mechanical Engineering
[2] Nanjing University,National Laboratory of Solid State Microstructures, School of Physics
来源：
Applied Physics A | 2022年 / 128卷
关键词：
Bloch surface wave; Lithium niobate; Refractive index sensor; Sensitivity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper demonstrates a novel Bloch surface wave (BSW) sensor with high sensitivity. A lithium niobate (LiNbO3) film is introduced on the top layer of SiO2/TiO2 one-dimensional photonic crystal. BSW resonance is excited by the Kretschmann prism. The rigorous coupled wave analysis method (RCWA) is used to conduct numerical simulation analysis of the designed BSW sensor. The wavelength and azimuth sensitivity of the designed sensor can reach 1522 nm/RIU and 646°/RIU, respectively, or even higher. The results reveal the potential application of LiNbO3 as a tunable material in the field of refractive index sensors for chemical and biological sensing.
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