A novel multi-functional all-dielectric metasurface sensor for moisture and salinity sensing applications
Applied Physics A: Materials Science and Processing, cilt.132, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 132 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s00339-026-10068-5
- Dergi Adı: Applied Physics A: Materials Science and Processing
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: All-dielectric metasurface absorber, Ground roasted coffee, Moisture sensing, Multi-functional sensor, Salinity sensing, Sandy soil
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
In this study, an all-dielectric metasurface absorber-based sensor structure consisting of an elliptical dielectric resonator (EDR), an inner and outer elliptical dielectric container (EDC), a sensing layer where the analyte material is placed covering the volume between the inner and outer EDC, and a support substrate is proposed for microwave frequency region sensing applications. Sensitivity analyses are performed numerically by changing the dielectric constant and loss tangent values of the analyte material. It is observed that the absorption resonance frequency and the absorption peak level change depending on the dielectric properties of the analyte material. For specific values of the dielectric constant of the analyte, the distributions of the electric and magnetic fields within the absorber structure at the absorption resonance frequencies are investigated, and the modes contributing to the absorption spectra are analyzed. The proposed absorber structure has been tested for moisture- and salinity-sensing applications. Two different moisture-sensing applications have been performed using finely ground roasted coffee (FGRC) and sandy soil (SS) for EDRs composed of ethyl methyl ketone and acetone. In addition, the salinity-sensing application has been performed with an EDR composed of acetonitrile by the dimensions of the sensing layer have been modified. The maximum sensitivity has been obtained as 42.210 MHz/ for FRGC and 40.09 MHz/ for SS, and as 2.977 MHz/ for salinity sensing application. The results indicate that the proposed all-dielectric absorber structure is a good candidate for multiple sensing applications of granular solid and liquid dielectric materials.