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High Q factor chalcogenide ring resonators for cavity-enhanced MIR spectroscopic sensing
Optics Express
|September 15, 2015
Summary
We developed high Q factor chalcogenide ring resonators for mid-infrared (MIR) sensing. These resonators achieved loaded Q factors up to 58,000, demonstrating their potential for sensitive MIR applications.
Area of Science:
- Materials Science
- Optical Engineering
- Nanotechnology
Background:
- Chalcogenide materials are crucial for mid-infrared (MIR) applications due to their unique optical properties.
- Ring resonators offer high sensitivity for various sensing applications.
- Developing high Q factor resonators is essential for improving sensing performance.
Purpose of the Study:
- To design and fabricate high Q factor chalcogenide ring resonators for MIR sensing.
- To characterize the optical performance of these resonators.
- To evaluate their potential for sensitive detection in the MIR spectrum.
Main Methods:
- Fabrication of racetrack coupled ring resonators using a Ge11.5As24Se64.5 core and Ge11.5As24S64.5 bottom cladding.
- Characterization of resonator performance at a wavelength of 5.2 μm.
- Measurement of loaded Q factor, intrinsic Q factor, and waveguide propagation loss.
Main Results:
- Achieved loaded Q factors as high as 58,000 at 5.2 μm.
- Determined an intrinsic Q factor of 145,000.
- Measured a low waveguide propagation loss of 0.84 dB/cm.
Conclusions:
- The fabricated chalcogenide ring resonators exhibit high Q factors suitable for MIR sensing.
- The demonstrated performance indicates significant potential for sensitive and selective detection in the MIR range.
- These findings pave the way for advanced MIR sensing technologies.
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