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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

2.8K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
2.8K
Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Related Experiment Video

Updated: Dec 9, 2025

Fabrication and Testing of Photonic Thermometers
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On-chip high-sensitivity photonic temperature sensor based on a GaAs microresonator.

Yongchao Chen, Jianping Li, Xiaojie Guo

    Optics Letters
    |September 15, 2020
    PubMed
    Summary

    We developed a highly sensitive on-chip photonic temperature sensor using a gallium arsenide (GaAs) microdisk resonator. This sensor achieves excellent sensitivity and resolution for precise temperature measurements in integrated systems.

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    Area of Science:

    • Photonics
    • Materials Science
    • Nanotechnology

    Background:

    • Integrated photonic devices offer miniaturization and high performance.
    • Gallium arsenide (GaAs) possesses a significant thermo-optic coefficient, crucial for temperature sensing.
    • On-chip sensors are vital for real-time monitoring in various applications.

    Purpose of the Study:

    • To demonstrate a high-sensitivity photonic temperature sensor.
    • To leverage the thermo-optic properties of GaAs for enhanced sensing.
    • To explore applications in chip-scale biological research and signal processing.

    Main Methods:

    • Fabrication of a microdisk resonator using GaAs.
    • Integration of the microdisk resonator onto a chip.
    • Characterization of the sensor's response to temperature variations.

    Main Results:

    • Achieved a temperature sensitivity of 0.142 nm/K.
    • Demonstrated a measurement resolution of 10 mK.
    • Utilized low input optical power of 0.5 µW.

    Conclusions:

    • The GaAs microdisk resonator enables highly sensitive on-chip temperature sensing.
    • The sensor shows potential for compact biological research tools.
    • This technology is promising for advanced integrated photonic signal processing.