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Real-time dynamic sensing with an on-chip nanophotonic sensor.

Yazhao Liu, H W M Salemink

|August 10, 2017

Summary

This study presents a novel nanophotonic sensor for real-time fluid flow monitoring. The silicon photonic crystal sensor accurately detects fluid composition changes, showing great potential for advanced fluid analysis.

Area of Science:

Nanophotonics
Microfluidics
Optical Sensing

Background:

Real-time monitoring of fluid flows is crucial in various scientific and industrial applications.
Existing methods may lack the sensitivity or real-time capabilities required for dynamic fluid analysis.

Purpose of the Study:

To develop and demonstrate a nanophotonic sensor for real-time monitoring of fluid flows.
To validate the sensor's performance using a silicon photonic crystal cavity and a microfluidic channel.

Main Methods:

Fabrication of a silicon photonic crystal cavity integrated with a microfluidic channel.
Simulation and experimental measurement of resonant wavelength shifts due to fluid composition.
Dynamic sensing experiments using controlled ratios of water and oil delivered via syringe pump.

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Main Results:

The sensor demonstrated a simulated resonant wavelength shift of 9.0 nm and an experimental shift of 10.0 nm with residual oil.
Excellent agreement was observed between sensor measurements and visual data of fluidic streams.
The sensor successfully monitored alternating fluid deliveries of water and oil.

Conclusions:

The developed nanophotonic sensor enables accurate real-time monitoring of fluid flows.
The sensor shows high sensitivity to changes in fluid composition.
This technology holds promise for applications requiring precise fluid analysis and control.