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Fabrication and Testing of Microfluidic Optomechanical Oscillators

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All-polymeric high-Q optofluidic Fabry-Perot resonator.

Genni Testa, Gianluca Persichetti, Romeo Bernini

|January 15, 2021

Summary

This study introduces a novel all-polymeric optofluidic Fabry-Perot resonator. This high-quality factor device offers sensitive refractive index sensing, rivaling advanced resonator technologies.

Area of Science:

Optofluidics
Polymer optics
Resonator devices

Background:

Fabry-Perot resonators are crucial optical components.
Existing fabrication methods can be complex and costly.
Need for high-performance, easily fabricated optical sensors.

Purpose of the Study:

To propose and test a novel all-polymeric optofluidic Fabry-Perot resonator.
To demonstrate its high quality factor and sensing capabilities.
To offer a simplified fabrication route for optical resonators.

Main Methods:

Fabrication of a multilayer polymeric film structure.
Utilizing interference mirrors for high reflectivity.
Testing the resonator's optical quality factor and finesse.

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Evaluating refractometric sensing performance.

Main Results:

Achieved a high quality factor (Q) of 3.03×10^4 and finesse of 91.
Demonstrated a high sensitivity of 314 nm/RIU for refractometric sensing.
Obtained a low limit of detection of 2.55×10^-5 RIU.
Reported a figure of merit of 1.36×10^4 RIU^-1.

Conclusions:

The all-polymeric Fabry-Perot resonator offers a simplified fabrication process.
Its performance is comparable to state-of-the-art photonic crystal and whispering gallery mode resonators.
This device presents a promising platform for high-performance optofluidic sensing applications.