中国物理B ›› 2022, Vol. 31 ›› Issue (4): 44102-044102.doi: 10.1088/1674-1056/ac2e60

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High-sensitivity Bloch surface wave sensor with Fano resonance in grating-coupled multilayer structures

Daohan Ge(葛道晗)1,2,†, Yujie Zhou(周宇杰)1, Mengcheng Lv(吕梦成)1, Jiakang Shi(石家康)1, Abubakar A. Babangida1, Liqiang Zhang(张立强)1,2,‡, and Shining Zhu(祝世宁)2   

  1. 1 Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China;
    2 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2021-07-04 修回日期:2021-10-05 接受日期:2021-10-11 出版日期:2022-03-16 发布日期:2022-03-10
  • 通讯作者: Daohan Ge, Liqiang Zhang E-mail:gedaohan@ujs.edu.cn;zhanglq4158@ujs.edu.cn
  • 基金资助:
    Project supported by Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180098) and National Laboratory of Solid State Microstructures, Nanjing University (Grant No. M33042).

High-sensitivity Bloch surface wave sensor with Fano resonance in grating-coupled multilayer structures

Daohan Ge(葛道晗)1,2,†, Yujie Zhou(周宇杰)1, Mengcheng Lv(吕梦成)1, Jiakang Shi(石家康)1, Abubakar A. Babangida1, Liqiang Zhang(张立强)1,2,‡, and Shining Zhu(祝世宁)2   

  1. 1 Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China;
    2 National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China
  • Received:2021-07-04 Revised:2021-10-05 Accepted:2021-10-11 Online:2022-03-16 Published:2022-03-10
  • Contact: Daohan Ge, Liqiang Zhang E-mail:gedaohan@ujs.edu.cn;zhanglq4158@ujs.edu.cn
  • Supported by:
    Project supported by Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180098) and National Laboratory of Solid State Microstructures, Nanjing University (Grant No. M33042).

摘要: A new type of device consisting of a lithium niobate film coupled with a distributed Bragg reflector (DBR) was theoretically proposed to explore and release Bloch surface waves for applications in sensing and detection. The film and grating made of lithium niobate (LiNbO3) were placed on both sides of the DBR and a concentrated electromagnetic field was formed at the film layer. By adjusting the spatial incidence angle of the incident light, two detection and analysis modes were obtained, including surface diffraction detection and guided Bloch detection. Surface diffraction detection was used to detect the gas molecule concentrations, while guided Bloch detection was applied for the concentration detection of biomolecule-modulated biological solutions. According to the drift of the Fano curve, the average sensor sensitivities from the analysis of the two modes were 1560 °/RIU and 1161 °/RIU, and the maximum detection sensitivity reached 2320 °/RIU and 2200 °/RIU, respectively. This study revealed the potential application of LiNbO3 as a tunable material when combined with DBR to construct a new type of biosensor, which offered broad application prospects in Bloch surface wave biosensors.

关键词: lithium niobate, Bloch surface wave, Fano resonance, grating structure, biosensor

Abstract: A new type of device consisting of a lithium niobate film coupled with a distributed Bragg reflector (DBR) was theoretically proposed to explore and release Bloch surface waves for applications in sensing and detection. The film and grating made of lithium niobate (LiNbO3) were placed on both sides of the DBR and a concentrated electromagnetic field was formed at the film layer. By adjusting the spatial incidence angle of the incident light, two detection and analysis modes were obtained, including surface diffraction detection and guided Bloch detection. Surface diffraction detection was used to detect the gas molecule concentrations, while guided Bloch detection was applied for the concentration detection of biomolecule-modulated biological solutions. According to the drift of the Fano curve, the average sensor sensitivities from the analysis of the two modes were 1560 °/RIU and 1161 °/RIU, and the maximum detection sensitivity reached 2320 °/RIU and 2200 °/RIU, respectively. This study revealed the potential application of LiNbO3 as a tunable material when combined with DBR to construct a new type of biosensor, which offered broad application prospects in Bloch surface wave biosensors.

Key words: lithium niobate, Bloch surface wave, Fano resonance, grating structure, biosensor

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)