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Fabrication and Testing of Photonic Thermometers
08:44

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Published on: October 24, 2018

Optical temperature sensing based on the Goos-Hänchen effect.

Chih-Wei Chen1, Wen-Chi Lin, Lu-Shing Liao

  • 1Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan.

Applied Optics
|August 7, 2007
PubMed
Summary

This study explores an optical sensor for temperature monitoring using the Goos-Hänchen (GH) effect. The sensor leverages temperature-dependent metal properties to detect thermal changes via beam shifts.

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Area of Science:

  • Photonics and optical sensing
  • Condensed matter physics
  • Materials science

Background:

  • The Goos-Hänchen (GH) effect describes the lateral displacement of a light beam upon reflection.
  • Temperature variations can alter the optical properties of materials, impacting light-matter interactions.
  • Developing precise optical sensors for temperature monitoring is crucial in various scientific and industrial fields.

Purpose of the Study:

  • To theoretically investigate the feasibility of an optical sensor for temperature monitoring.
  • To explore the Goos-Hänchen effect's potential for sensing temperature changes.
  • To identify optimal conditions for maximizing temperature sensitivity.

Main Methods:

  • A theoretical model was developed to analyze the GH effect at a metal-dielectric interface.
  • The model incorporates the temperature dependence of the metal's optical properties.
  • Simulations focused on the lateral shift of p-polarized light at near-grazing incidence.

Main Results:

  • The lateral shift (GH shift) is shown to be a function of temperature.
  • The temperature dependence of the metal's optical properties is the primary driver of the GH shift variation.
  • Negative GH shifts exhibit significant temperature-dependent variations under specific conditions.

Conclusions:

  • An optical sensor based on the Goos-Hänchen effect for temperature monitoring is theoretically possible.
  • Optimal performance is achieved using long-wavelength, p-polarized light at near-grazing incidence.
  • The proposed sensor offers a novel approach to optical temperature sensing by exploiting material property changes.