Design and Optimization of a Compact 2D Photonic Crystal Filter with a Diamond-Shaped Cavity for Optical Sensing
| Authors | F. Kebaili1, A. Harhouz1 , H. Tayoub1,2 , A. Hocini1 |
| Affiliations |
1Laboratoire d’Analyse des Signaux et Systèmes, Faculty of Technology, Department of Electronics, University Pole, Bordj Bou Arreridj Road, 28000 Msila, Algeria 2Research Center in Industrial Technologie CRTI, P.O.BOX:64, Cheraga 16014 Algiers, Algeria |
| Е-mail | farida.kebaili@univ-msila.dz |
| Issue | Volume 18, Year 2026, Number 3 |
| Dates | Received 25 January 2026; revised manuscript received 22 June 2026; published online 26 June 2026 |
| Citation | F. Kebaili, A. Harhouz, et al., J. Nano- Electron. Phys. 18 No 3, 03006 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(3).03006 |
| PACS Number(s) | 07.05.Tp, 42.79.Ci |
| Keywords | PhC filter, Cavity (4) , FDTD (6) , Optical filter, Optical sensing, Selectivity (2) . |
| Annotation |
This paper presents the design, modeling, and simulation of an optical filter based on a two-dimensional photonic crystal (PhC), using RSoft software. The proposed structure consists of a periodic array of silicon rods incorporating a diamond-shaped central cavity. Numerical simulations were conducted to evaluate the influence of key parameters – such as rod radius, lattice periodicity, and substrate refractive index (RI) – on the spectral response of the filter. The study identified an optimal configuration (lattice period a = 0.45 m, r1 = 0.125 m, r2 = 0.08 m), offering a good trade-off between compactness, selectivity, and quality factor. The results demonstrated the ability of the structure to produce sharp and well-defined resonance peaks, and highlighted the sensitivity of the resonant wavelength to the optical properties of the substrate material.This work provides a relevant contribution to the design of efficient PhC filters and offers a solid technical foundation for further developments in integrated optics, particularly for applications in telecommunications and optical sensing. |
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