Ultrathin reflecting wideband terahertz cross polarization converter as a biosensor

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-01-01 DOI:10.1016/j.materresbull.2024.113292

Vikram Maurya, Sarthak Singhal

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Abstract

This work presents an ultrathin terahertz linear cross polarization converter (LCPC) with a unit cell volume of 0.125λ_L × 0.125λ_L × 0.67λ_L (λ_L= wavelength at 3.1285 THz). The unit cell consists of a metallic resonator composed of two l-shaped structures, a center cross-shaped structure, a dielectric material, and a metallic ground plane. The suggested LCPC has a Polarization Converter Ratio (PCR)≥80 % from 3.1285 THz to 9.6 THz with an FWHM of 6.776 THz. This polarization converter transforms x-polarized to y-polarized waves and vice versa. The PCR≥80 % bandwidth and PCR≥90 % peaks are almost unaffected for incident angle(θ)≤20° and θ≤45°, respectively, at 3.34, 5.15, 7.92, and 9.42 THz. The LCPC's equivalent circuit model (ECM) results agree with the simulated results. This LCPC-based biosensor detects blood cancer, basal skin cell cancer, and TB with a maximum sensitivity of ∼0.9302 THz/RIU, ∼0.9441 THz/RIU, and ∼0.9554 THz/RIU respectively.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.