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Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Biosensing using microring resonator interferograms.

Shih-Hsiang Hsu¹, Yung-Chia Yang², Yu-Hou Su³

¹Department of Electronic Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Rd., Taipei 10607, Taiwan. shsu@mail.ntust.edu.tw.

Sensors (Basel, Switzerland)

|January 18, 2014

Summary

This summary is machine-generated.

This study demonstrates a novel glucose biosensor using optical low-coherence interferometry (OLCI) and silicon-wire microring resonators (MRRs). The sensor achieves high sensitivity and a low detection limit for refractive index changes, crucial for accurate glucose monitoring.

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Last Updated: May 3, 2026

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Area of Science:

Photonics
Nanotechnology
Biomedical Engineering

Background:

Silicon-wire microring resonators (MRRs) offer potential for refractive index sensing.
Optical low-coherence interferometry (OLCI) can be utilized for precise measurements.

Purpose of the Study:

To develop and characterize a glucose biosensor based on OLCI and MRR technology.
To investigate the influence of MRR parameters on sensing performance.

Main Methods:

Utilized silicon-wire MRRs with varying effective lengths for glucose sensing.
Employed OLCI with a 1,310 nm DFB laser for interferogram analysis.
Investigated multimode interference (MMI) couplers for broadband response.

Main Results:

Achieved a glucose sensing sensitivity of 0.00279 m/RIU with a Q factor of ~30,000.
Demonstrated a lowest sensing limitation of 2 × 10-4 RIU.
Characterized silicon wire effective refractive index with 655 nm accuracy.

Conclusions:

The developed OLCI-MRR system is a promising platform for sensitive glucose biosensing.
MRR effective length and quality factor are critical for optimizing sensor performance.
The study validates the use of MRR effective length for determining silicon wire refractive index.