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Updated: May 8, 2026
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Fabrication of Silica Ultra High Quality Factor Microresonators
Published on: July 2, 2012
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Design and performance simulation of a silica microdisk cavity optical pressure sensor
Applied Optics
|June 10, 2024
Summary
This study introduces a novel silica microdisk cavity sensor for measuring minute optical pressure. The sensor achieves high optical quality factor and sensitivity, outperforming existing methods for light-matter interaction sensing.
Area of Science:
- Opto-mechanics
- Nanophotonics
- Optical sensing
Background:
- Whispering-gallery mode (WGM) microcavities enhance light-matter interactions for sensing applications.
- Measuring subtle optical pressure in laser-matter interactions requires highly sensitive devices.
Purpose of the Study:
- To design and simulate a silica microdisk cavity sensor with a metal film for precise optical pressure measurement.
- To optimize the sensor's structural parameters for enhanced opto-mechanical coupling.
Main Methods:
- Utilized the finite element method (FEM) to investigate the opto-mechanical coupling mechanism.
- Optimized sensor parameters considering both optical and mechanical properties.
- Simulated the performance of the designed microdisk cavity sensor.
Main Results:
- Achieved an optical quality factor (Q) of ~10^4 at 1550 nm.
- Sensing sensitivity reached 5.32 mPa/Hz^1/2 with an optical force resolution of 6.61×10^-12 N.
- Demonstrated superior performance compared to thin-film interferometry and optical lever methods.
Conclusions:
- The designed silica microdisk cavity sensor shows significant potential for sensitive optical pressure detection.
- The sensor's high Q-factor and sensitivity enable precise measurements of light-matter interactions.
- This technology offers an improved alternative for advanced optical sensing applications.
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