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High sensitivity and large measurement range refractometric sensing based on Mach-Zehnder interferometer

  • G. Zhang
  • , H. Cai
  • , Y. D. Gu
  • , J. F. Song
  • , B. Dong
  • , Z. C. Yang
  • , Y. F. Jin
  • , Y. L. Hao
  • , S. P. Sivalingam
  • , P. H. Yap
  • , D. L. Kwong
  • , A. Q. Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

An on-chip refractive index (RI) sensor with high sensitivity and large measurement range is demonstrated. The sensing scheme presented here is based on Mach-Zehnder interferometer configuration built on an SOI wafer. The measured wavelength sensitivity reaches 3498.6 nm/RIU (TE-mode). Meanwhile, according to the period changes of interference patterns, the measured period sensitivities are 20.4 nm/RIU (TE-mode) and 61.1 nm/RIU (TM-mode), respectively. Therefore, the fine index change detection limit reaches up to 1.1×10-5 RIU, while the period shift for larger index change detection has a measurement range of several RIU. By making an array, the proposed on-chip sensor has a potential application for multiple samples detection, such as chemical and bio-toxins in drinking water ranging from sub-nanogram to picogram level.

Original languageEnglish
Title of host publicationMEMS 2016 - 29th IEEE International Conference on Micro Electro Mechanical Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages298-301
Number of pages4
ISBN (Electronic)9781509019731
DOIs
Publication statusPublished - 26 Feb 2016
Externally publishedYes
Event29th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2016 - Shanghai, China
Duration: 24 Jan 201628 Jan 2016

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Volume2016-February
ISSN (Print)1084-6999

Conference

Conference29th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2016
Country/TerritoryChina
CityShanghai
Period24/01/1628/01/16

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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