2926-10-28
A Novel High-Sensitivity Photonic Crystal Sensor for Temperature Sensing
By
Progress In Electromagnetics Research M, Vol. 141, 9-16, 2026
Abstract
This study proposes and numerically investigated a high-sensitivity two-dimensional photonic crystal temperature sensor using a hexagonal silicon lattice. The design features a resonant microcavity coupled with two quasi-linear waveguides to enhance light-matter interactions and optimise the thermo-optic response. Rigorous finite-difference time-domain (FDTD) simulations indicate that the sensor achieves a high thermal sensitivity of ST = 105 pm/° C, accompanied by an excellent linear fitting coefficient. Furthermore, the optimised cavity demonstrates a high quality factor of Q =7739.5 and a narrow resonant linewidth, resulting in an ultra-low detection limit. With an ultra-compact footprint of 62.73 μm², the sensor is fully compatible with standard silicon-on-insulator (SOI) CMOS fabrication processes. These attributes render the proposed device a promising candidate for high-precision, dense thermal monitoring in integrated photonic circuits, lab-on-chip devices, and environmental sensing applications.
Citation
Fatima Zohra Siabah, Faiza Bounaas, and Amel Labbani, "A Novel High-Sensitivity Photonic Crystal Sensor for Temperature Sensing," Progress In Electromagnetics Research M, Vol. 141, 9-16, 2026.
DOI:10.2528/PIERM26082204
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