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Pressure and temperature dual-parameter optical sensor based on the MIM waveguide structure coupled with two T-shaped
Applied Optics
|September 14, 2023
Summary
This study presents a novel optical sensor for simultaneous pressure and temperature detection using T-shaped cavities. The sensor achieves high sensitivity and independent measurement of both parameters without interference.
Area of Science:
- Photonics and optical sensing technologies.
- Nanophotonics and waveguide devices.
- Multifunctional sensor design.
Background:
- Accurate simultaneous measurement of pressure and temperature is crucial for various industrial and scientific applications.
- Existing sensors often face challenges with cross-interference and limited sensitivity.
- Metal-insulator-metal (MIM) waveguide structures offer promising platforms for developing advanced optical sensors.
Purpose of the Study:
- To design and simulate a multifunctional optical sensor capable of simultaneous pressure and temperature detection.
- To investigate the performance of T-shaped resonant cavities within an MIM waveguide structure for multiparameter sensing.
- To achieve independent sensing of pressure and temperature with high sensitivity and minimal interference.
Main Methods:
- Utilizing a metal-insulator-metal (MIM) waveguide structure integrated with two T-shaped resonant cavities.
- Simulating the optical response of the sensor to applied pressure and temperature variations.
- Analyzing Fano resonance shifts at different wavelengths for separate parameter detection.
- Incorporating solid polydimethylsiloxane as a thermo-sensitive material in one cavity.
Main Results:
- The upper T-shaped cavity demonstrated linear pressure sensitivity up to 12.48 nm/MPa, with a subsequent quadratic relationship at higher pressures.
- The lower T-shaped cavity, utilizing polydimethylsiloxane, achieved a temperature sensitivity of 0.36 nm/°C.
- Optimized Fano resonances enabled independent and non-interfering sensing of both pressure and temperature.
Conclusions:
- The designed optical sensor effectively achieves simultaneous and independent detection of pressure and temperature.
- The proposed sensor architecture offers high sensitivity and broad application potential in multiparameter monitoring scenarios.
- This work contributes to the advancement of integrated photonic sensors for complex environmental monitoring.
