Mode-multiplexed waveguide sensor

Research output: Contribution to journalArticlepeer-review


  • Ahmmed A. Rifat
  • Seok Hyun Yun
  • Safyan Khan

Colleges, School and Institutes

External organisations

  • University of Malaya
  • Massachusetts Institute of Technology
  • King Fahd University of Petroleum and Minerals


Optical sensors enable quantification of analyte concentrations non-invasively without being affected from electromagnetic fields. The development of single-mode waveguides (WGs) is simple approach; however, limitations in the spatial distribution of the refractive index and the inability to sense multiple samples at the same time. Here, we demonstrate a multi-mode WG model and matrix inversion method (MIM) to improve spatial information in at least one dimension. This method is used to optimize and estimate three external stimulus properties in TE00, TE01 and TM00 multiplexed modes for a semi-triangular ring resonator configuration. The multi-mode WG and MIM may have applications in the development of biosensors for multi-analyte detection.


Original languageEnglish
Pages (from-to)444 - 455
Number of pages12
JournalJournal of Electromagnetic Waves and Applications
Issue number4
Early online date16 Dec 2015
Publication statusE-pub ahead of print - 16 Dec 2015


  • directional couplers, mode multiplexing, multi-mode waveguides, optical sensing, sensors