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Fabrication and Testing of Photonic Thermometers
Published on: October 24, 2018
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Towards Replacing Resistance Thermometry with Photonic Thermometry
Nikolai Klimov1,2, Thomas Purdy3, Zeeshan Ahmed2
1Joint Quantum Institute, University of Maryland, College Park, MD 20742.
Sensors and Actuators. A, Physical
|December 20, 2017
Summary
Silicon photonic crystal cavity thermometers offer a stable and cost-effective alternative to traditional resistance thermometry. These advanced photonic sensors achieve 175 mK uncertainties, marking significant progress in temperature measurement technology.
Area of Science:
- Photonics
- Materials Science
- Metrology
Background:
- Resistance thermometry is a mature technology with inherent limitations.
- There is a growing need for cost-effective and stable temperature sensors.
- Photonic temperature sensors offer a promising alternative to conventional methods.
Purpose of the Study:
- To demonstrate the efficacy of silicon photonic crystal cavity-based thermometers.
- To assess the performance and uncertainties of these novel sensors.
- To compare their capabilities against existing temperature measurement technologies.
Main Methods:
- Fabrication of silicon photonic crystal cavities.
- Integration into a thermometer device.
- Characterization of temperature measurement performance and uncertainties.
Main Results:
- Achieved temperature measurement uncertainties of 175 mK (k = 1).
- Identified device packaging hysteresis as the primary source of uncertainty.
- Demonstrated a ≈ 4-fold improvement over recent developments in photonic sensing.
Conclusions:
- Silicon photonic crystal cavity thermometers show significant potential for replacing legacy devices.
- Further research into packaging materials is needed to minimize hysteresis and improve long-term stability.
- These sensors represent a substantial advancement in high-precision thermometry.
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