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Fabrication and Testing of Photonic Thermometers
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Multilayer metal/metal-oxide diffractive structure for photonic temperature sensing.

Loukas Athanasekos1, Miltiadis Vasileiadis, Anna Tsigara

  • 1Department of Materials Science, University of Patras, Rio, Patras 26500, Greece. athanasekos@eie.gr

Optics Letters
|December 3, 2010
PubMed
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Researchers developed novel metal/metal-oxide gratings for precise photonic temperature sensing. These structures exhibit a significant, measurable change in light diffraction with temperature variations, enabling remote sensing applications.

Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Development of advanced optical sensors is crucial for real-time monitoring in various applications.
  • Metal/metal-oxide nanostructures offer unique optical properties for sensing applications.

Purpose of the Study:

  • To design and fabricate multilayer metal/metal-oxide surface relief diffractive gratings.
  • To investigate the temperature dependence of diffractive effects for photonic temperature sensing.
  • To demonstrate remote, spatially localized temperature sensing using these grating structures.

Main Methods:

  • Fabrication of alternating Platinum (Pt) and Tin Oxide (SnO(x)) layers.
  • Optical interrogation at 633 nm to measure reflection and transmission.
  • Rigorous Coupled Wave Analysis (RCWA) for theoretical validation.

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Main Results:

  • Demonstrated temperature-dependent diffractive effects in Pt/SnO(x) multilayer gratings.
  • Achieved a sensitivity of 10% per °C in the zeroth-order transmission mode.
  • Experimental results showed good agreement with RCWA simulations.

Conclusions:

  • Multilayer metal/metal-oxide gratings are effective for photonic temperature sensing.
  • The developed structures enable remote and spatially localized temperature measurements.
  • The study validates the use of RCWA for analyzing such composite optical elements.