中国物理B ›› 2017, Vol. 26 ›› Issue (7): 77301-077301.doi: 10.1088/1674-1056/26/7/077301

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

Plasmonic Mach–Zehnder interferometric sensor based on a metal–insulator–metal nanostructure

Meng Shen(沈萌), Ming Wang(王鸣), Lan Du(杜澜), Ting-Ting Pan(潘庭婷)   

  1. Jiangsu Key Laboratory on Opto-Electronic Technology, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
  • 收稿日期:2017-02-14 修回日期:2017-04-10 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Ming Wang E-mail:wangming@njnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.51405240 and 61178044),the Natural Science Foundation of Jiangsu Province of China (Grant No.BK20161559),the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province of China (Grant No.16KJB510018),and University Postgraduate Research and Innovation Project of Jiangsu Province,China (Grant No.KYLX16_1289).

Plasmonic Mach–Zehnder interferometric sensor based on a metal–insulator–metal nanostructure

Meng Shen(沈萌), Ming Wang(王鸣), Lan Du(杜澜), Ting-Ting Pan(潘庭婷)   

  1. Jiangsu Key Laboratory on Opto-Electronic Technology, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
  • Received:2017-02-14 Revised:2017-04-10 Online:2017-07-05 Published:2017-07-05
  • Contact: Ming Wang E-mail:wangming@njnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.51405240 and 61178044),the Natural Science Foundation of Jiangsu Province of China (Grant No.BK20161559),the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province of China (Grant No.16KJB510018),and University Postgraduate Research and Innovation Project of Jiangsu Province,China (Grant No.KYLX16_1289).

摘要: A plasmonic Mach–Zehnder interferometric sensor based on a semicircular aperture-slit nanostructure patterned on a metal–insulator–metal film is proposed and demonstrated by finite difference time domain (FDTD) simulation. Due to the interference between two different surface plasmon polariton modes in this design, the transmission spectra exhibit oscillation behaviors in a broad bandwidth, and can be readily tailored by changing the SPP path length and core layer thickness. Based on this principle, the characteristics of refractive index sensing are also demonstrated by simulation. This structure is illuminated with a collimated light source from the back side to avoid impacts on the interference. Meanwhile, these results show that the proposed structure is promising for portable, efficient, and sensitive biosensing applications.

关键词: surface plasmon polariton, Mach–, Zehnder interferometry, metal–, insulator–, metal structures

Abstract: A plasmonic Mach–Zehnder interferometric sensor based on a semicircular aperture-slit nanostructure patterned on a metal–insulator–metal film is proposed and demonstrated by finite difference time domain (FDTD) simulation. Due to the interference between two different surface plasmon polariton modes in this design, the transmission spectra exhibit oscillation behaviors in a broad bandwidth, and can be readily tailored by changing the SPP path length and core layer thickness. Based on this principle, the characteristics of refractive index sensing are also demonstrated by simulation. This structure is illuminated with a collimated light source from the back side to avoid impacts on the interference. Meanwhile, these results show that the proposed structure is promising for portable, efficient, and sensitive biosensing applications.

Key words: surface plasmon polariton, Mach–Zehnder interferometry, metal–insulator–metal structures

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

  • 73.20.Mf
73.21.Ac (Multilayers) 42.25.Hz (Interference) 07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)