中国物理B ›› 2016, Vol. 25 ›› Issue (3): 37303-037303.doi: 10.1088/1674-1056/25/3/037303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

A subwavelength metal-grating assisted sensor of Kretschmann style for investigating the sample with high refractive index

Xu-Feng Li(李旭峰), Wei Peng(彭伟), Ya-Li Zhao(赵亚丽), Qiao Wang(王乔), Ji-Lin Wei(魏计林)   

  1. 1. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;
    3. No. 33 Research Institute of China Electronics Technology Group Corporation, Taiyuan 030024, China
  • 收稿日期:2015-09-30 修回日期:2015-11-24 出版日期:2016-03-05 发布日期:2016-03-05
  • 通讯作者: Xu-Feng Li E-mail:xfli@mail.dlut.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61137005 and 61178067), the Science Foundation of Shanxi Province, China (Grant No. 2013021004-3/2014021021-1), the Pre-studied Project on Weapon Equipment, China (Grant No. 201262401090404), and the Specialized Research Foundation for Doctor of School, China (Grant No. 20122027).

A subwavelength metal-grating assisted sensor of Kretschmann style for investigating the sample with high refractive index

Xu-Feng Li(李旭峰)1, Wei Peng(彭伟)2, Ya-Li Zhao(赵亚丽)3, Qiao Wang(王乔)2, Ji-Lin Wei(魏计林)1   

  1. 1. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;
    3. No. 33 Research Institute of China Electronics Technology Group Corporation, Taiyuan 030024, China
  • Received:2015-09-30 Revised:2015-11-24 Online:2016-03-05 Published:2016-03-05
  • Contact: Xu-Feng Li E-mail:xfli@mail.dlut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61137005 and 61178067), the Science Foundation of Shanxi Province, China (Grant No. 2013021004-3/2014021021-1), the Pre-studied Project on Weapon Equipment, China (Grant No. 201262401090404), and the Specialized Research Foundation for Doctor of School, China (Grant No. 20122027).

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摘要： In this paper, a subwavelength metal-grating assisted sensor of Kretschmann style that is capable of detecting the sample with a refractive index higher than that of the substrate is proposed. The sensor configuration is similar to the traditional Kretschmann structure, but the metal film is pattered into a grating. As a TM-polarized laser beam impinges from the substrate, a resonant dip point in reflectance curve is produced at a certain incident angle. Our studies indicate that the sensing sensitivity and resolution are affected by the grating's gap and period, and after these parameters have been optimized, a sensing sensitivity of 51.484°/RIU is obtained with a slightly changing resolution.

关键词: surface plasmons, sensing, finite-difference time-domain method

Abstract: In this paper, a subwavelength metal-grating assisted sensor of Kretschmann style that is capable of detecting the sample with a refractive index higher than that of the substrate is proposed. The sensor configuration is similar to the traditional Kretschmann structure, but the metal film is pattered into a grating. As a TM-polarized laser beam impinges from the substrate, a resonant dip point in reflectance curve is produced at a certain incident angle. Our studies indicate that the sensing sensitivity and resolution are affected by the grating's gap and period, and after these parameters have been optimized, a sensing sensitivity of 51.484°/RIU is obtained with a slightly changing resolution.

Key words: surface plasmons, sensing, finite-difference time-domain method

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing) 02.60.Cb (Numerical simulation; solution of equations)