ArticleScientific reports2025
Highly sensitive salinity sensing using annular one-dimensional photonic crystals.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Dispersion Engineering and Sensitivity Enhancement in Photonic Crystal Waveguide Sensors: Current Advances and Emerging Challenges.Sensors (Basel, Switzerland) · 2026Review
- Effect of fabrication error on the sensitivity of a one-dimensional photonic crystal sensor for cancer detection.Scientific reports · 2026Article
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Authors and funding
5 authors.
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Abstract
This study explores annular one-dimensional (1D) photonic crystals (PCs) in detail as potentially useful instruments for applications involving salinity detection. The distinctive configuration of annular 1D PCs facilitates the containment and manipulation of light within a concise and unified framework, facilitating the creation of compact and portable sensing apparatus suitable for on-site applications and real-time monitoring. Unlike conventional planar and texturing-based PC sensors, the annular configuration enhances light confinement and defect mode engineering, leading to superior sensing performance. The study describes the simulation process that uses the COMSOL Multiphysics technique and the Finite Element Method (FEM) to create annular 1D PCs, underscoring the criticality of precise management of layer thickness and uniformity. Wherein, the structure of a 1D- annular PC is created as [Formula: see text], since A represents Silicon dioxide ([Formula: see text] and B signifies Titanium dioxide ([Formula: see text]) with material thicknesses set at 850 nm for each. D represents the central defect layer from saline water, which equals 3400 nm, and N equals 5. Hence, we achieve an exceptional sensitivity of 1910.6 nm/RIU, surpassing most reported 1D-PC salinity sensors. Also, the materials used in our design ([Formula: see text] are highly chemically and mechanically stable which resistant to etching in the saline water. Furthermore, we discuss the feasibility of fabricating the proposed sensor using advanced nanofabrication techniques, ensuring its practical implementation in environmental and biomedical monitoring applications.
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