ArticleScientific reports2025
A tunable graphene terahertz sensor with high sensitivity and figure of merit for refractive index biosensing.
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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Who cites it
2 citing papers in PubMed.
- High-Sensitivity Terahertz Sensors for Sample Detection.Sensors (Basel, Switzerland) · 2026Article
- A simulation-based plasmonic terahertz nanosensor with graphene-enhanced sensitivity for diabetes monitoring.Scientific reports · 2025Article
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4 authors.
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Abstract
This study presents the design, numerical modeling, and performance analysis of a tunable graphene-based terahertz (THz) sensor exhibiting multiband resonance behavior. The proposed device leverages the unique electro-optical properties of graphene, where modulation of the chemical potential (V) enables dynamic control over the electromagnetic response. This tunability allows real-time ON/OFF operation and precise frequency reconfiguration, resulting in enhanced adaptability for diverse sensing scenarios. The sensor supports four distinct resonance modes at 0.22, 0.35, 0.70, and 0.88 THz, covering a wide portion of the THz spectrum and making it particularly suitable for multiband detection. Simulation results reveal that increasing the chemical potential shifts all resonance modes toward higher frequencies, a consequence of enhanced graphene conductivity and improved impedance matching between the sensor and the surrounding medium. This frequency agility is critical for applications where detection bands need to be dynamically selected or reconfigured. The proposed design exhibits sharp resonance dips, high spectral selectivity, and elevated sensitivity, leading to an impressive figure of merit (FOM) of up to 5.30 RIU⁻
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