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A Self-Reference Interference Sensor Based on Coherence Multiplexing.

Ying Shen1, Zeyu Huang1, Feng Huang1

  • 1School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, China.

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Summary
This summary is machine-generated.

This study introduces a novel self-referencing interference sensor using coherence multiplexing to overcome environmental disturbances in biosensing. The developed sensor effectively eliminates temperature and non-specific binding, enhancing detection robustness for applications like drug screening.

Keywords:
biomolecular interactionbiosensingdifferential measurementlabel-free detectionphase-sensitive interferometry

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Area of Science:

  • Biophotonics
  • Biosensing technologies
  • Optical metrology

Background:

  • Interferometry is crucial for real-time biosensing of molecular interactions.
  • Environmental factors like temperature fluctuations and non-specific binding compromise sensor accuracy.
  • Existing interferometric sensors often lack robustness against these disturbances.

Purpose of the Study:

  • To develop a self-referencing interference sensor resistant to environmental disturbances.
  • To enhance the robustness and reliability of biosensing detection.
  • To enable accurate real-time monitoring of biomolecular interactions.

Main Methods:

  • A self-referencing interference sensor based on coherence multiplexing.
  • Encoding sensor signals using specific optical path differences.
  • Simultaneous detection and differencing of disturbance and detection signals for real-time self-referencing.

Main Results:

  • Demonstrated elimination of non-specific binding and temperature disturbances.
  • Achieved enhanced detection robustness in real-time biomolecule detection.
  • Validated performance through temperature fluctuation and protein A-IgG binding experiments.

Conclusions:

  • The proposed sensor effectively mitigates environmental interference in biosensing.
  • Coherence multiplexing offers a robust solution for reliable biomolecular interaction analysis.
  • The sensor is well-suited for large-scale applications such as drug screening.