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Related Experiment Video

Updated: May 29, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Optical method for measuring thermal accommodation coefficients using a whispering-gallery microresonator.

D Ganta1, E B Dale, J P Rezac

  • 1Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072, USA.

The Journal of Chemical Physics
|September 8, 2011
PubMed
Summary
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A new optical technique measures thermal accommodation coefficients using a microresonator. This method precisely determines gas-surface thermal equilibrium, advancing gas property analysis.

Area of Science:

  • Physics
  • Materials Science
  • Chemical Engineering

Background:

  • Thermal accommodation coefficient (TAC) is crucial for understanding gas-surface interactions.
  • Existing TAC measurement methods can be complex or limited in scope.
  • Accurate TAC data is vital for applications in heat transfer and microfluidics.

Purpose of the Study:

  • To develop a novel optical method for measuring TAC in the temperature-jump regime.
  • To utilize the temperature dependence of a microresonator's whispering-gallery mode for thermal relaxation time measurement.
  • To establish a versatile technique for TAC determination on various surfaces.

Main Methods:

  • Employed a fused-silica microresonator and its whispering-gallery mode resonant frequency.

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Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Related Experiment Videos

Last Updated: May 29, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

  • Measured thermal relaxation time by observing frequency shifts with changing gas pressure.
  • Used a tunable diode laser (1570 nm) and tapered-fiber coupling to probe the microsphere.
  • Investigated the effect of thin-film coatings on TAC measurements.

    • Main Results:

    • Successfully measured TAC for air, helium, and nitrogen on fused silica at room temperature.
    • Demonstrated the method's capability to measure TAC on modified surfaces using thin-film coatings.
    • Established a correlation between thermal relaxation time, gas pressure, and TAC.

    Conclusions:

    • The novel optical method provides an accurate and versatile approach for TAC measurement.
    • The technique is applicable to a wide range of gases and modified surfaces.
    • This method offers a valuable tool for fundamental studies of gas-surface thermal transport.