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Updated: Jul 9, 2025

Fabrication and Testing of Photonic Thermometers

Fabrication and Testing of Photonic Thermometers

Published on: October 24, 2018

A temperature sensor based on Si/PS/SiO₂ photonic crystals.

Arafa H Aly¹, B A Mohamed², M Al-Dossari³

¹TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni Suef, 62514, Egypt. arafa.hussien@science.bsu.edu.eg.

Scientific Reports

|December 6, 2023

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This study introduces a defective photonic crystal sensor for ultra-sensitive temperature detection. The novel silicon/porous silica/silicon dioxide structure demonstrates high sensitivity, overcoming limitations of conventional sensors.

Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Conventional temperature sensors face limitations in sensitivity and accuracy.
Photonic crystals offer unique optical properties for sensing applications.
Defective photonic crystal structures can exhibit enhanced sensitivity to external stimuli.

Purpose of the Study:

To investigate the temperature-sensing capabilities of a defective one-dimensional photonic crystal (1DPC) structure.
To analyze the thermal properties and defect mode variations in the Si/PS/SiO2 structure.
To evaluate the potential of this structure as an ultra-sensitive temperature sensor.

Main Methods:

Fabrication of a defective 1DPC structure with alternating Si/PS layers and a central SiO2 defect layer.

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Utilizing the transfer matrix method and MATLAB for simulating transmission spectra.

Computing transmission spectra across a temperature range of 25-900 °C.

Main Results:

The defect mode exhibited significant shifts with increasing temperature due to thermal expansion and the thermo-optical coefficient.
The structure demonstrated a considerable impact on the transmission intensity of the defect mode.
Achieved a high quality factor of 2216.6 and a sensitivity of 0.085 nm/°C.

Conclusions:

The proposed defective photonic crystal sensor shows promise for ultra-sensitive temperature detection.
The design offers a potential solution to overcome challenges associated with conventional temperature sensors.
The demonstrated sensitivity and quality factor support its application in advanced temperature sensing.