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Lasing Emission from Soft Photonic Crystals for Pressure and Position Sensing
Tsan-Wen Lu1, Zhen-Yu Wang1, Kuang-Ming Lin1
1Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.
Nanomaterials (Basel, Switzerland)
|November 24, 2023
Summary
We developed a 1D photonic crystal nanocavity sensor for precise pressure and position detection. This optical sensor achieves high sensitivity, detecting minimal pressure changes and pinpointing locations with micrometer resolution.
Area of Science:
- Photonics
- Optical Sensing
- Nanotechnology
Background:
- 1D photonic crystal (PhC) nanocavities offer unique optical properties.
- Developing highly sensitive optical sensors for pressure and position is crucial for various applications.
Purpose of the Study:
- To introduce a novel 1D PhC nanocavity integrated with strain amplifiers for enhanced optical sensing.
- To evaluate the sensor's performance in detecting uniform and localized pressure, and its capability for position sensing.
Main Methods:
- Fabrication of a 1D PhC nanocavity within a polydimethylsiloxane substrate.
- Characterization of the nanocavity's optical wavelength response to applied uniform and localized pressure.
- Validation of strain amplifiers as waveguides for signal extraction.
Main Results:
- The nanocavity detected a minimum uniform pressure of 1.6‱.
- Localized pressure mapping demonstrated position-dependent resolution from tens to hundreds of micrometers.
- A 64% unidirectional coupling efficiency was achieved for signal extraction using strain amplifiers.
Conclusions:
- The developed PhC nanocavity sensor exhibits high sensitivity for both pressure and position detection.
- Strain amplifiers effectively function as waveguides for sensor signal extraction.
- This technology holds promise for creating advanced planar position-sensing modules.
