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Fabrication of Refractive-index-matched Devices for Biomedical Microfluidics
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Planar Optofluidic Integration of Ring Resonator and Microfluidic Channels.

Genni Testa1, Gianluca Persichetti1, Romeo Bernini1

  • 1Institute for Electromagnetic Sensing of the Environment (IREA), National Research Council (CNR), Via Diocleziano, 328, 80124 Naples, Italy.

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Summary

Researchers developed an optofluidic ring resonator integrating microfluidic channels for efficient liquid delivery. This novel design minimizes optical losses, achieving a quality factor of 4 x 10^3, suitable for advanced optofluidic applications.

Keywords:
antiresonant reflecting optical waveguide (ARROW)integrated opticsmicrofluidicsoptical resonatorsoptofluidics

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Area of Science:

  • Photonics and Microfluidics
  • Integrated Optics
  • Materials Science

Background:

  • Optofluidic devices combine optical and fluidic functionalities.
  • Integrating microfluidic channels into optical resonators often introduces significant propagation losses.
  • Efficient liquid delivery is crucial for sensing and manipulation in optofluidic systems.

Purpose of the Study:

  • To develop a hybrid silicon-polymer planar ring resonator with integrated microfluidic channels.
  • To achieve low-loss integration of microfluidic channels within the resonator structure.
  • To demonstrate the performance of the integrated device through optical characterization.

Main Methods:

  • Fabrication of a hybrid silicon-polymer planar ring resonator.
  • Integration of microfluidic channels using self-imaging in multimode interference couplers.
  • Numerical simulations to minimize propagation losses.
  • Optical characterization by measuring the quality factor.

Main Results:

  • Successful fabrication of an optofluidic hybrid silicon-polymer planar ring resonator.
  • Demonstration of low-loss microfluidic channel integration.
  • Achieved a quality factor of 4 x 10^3.
  • The quality factor is comparable to devices without integrated microfluidics.

Conclusions:

  • The proposed method enables low-loss integration of microfluidic channels in planar optofluidic ring resonators.
  • The hybrid silicon-polymer design is suitable for efficient liquid delivery and optofluidic applications.
  • This approach advances the development of integrated optofluidic devices.