ArticleNanoscale advances2021
Bipolar charge trapping for absorption enhancement in a graphene-based ultrathin dual-band terahertz biosensor.
Article in Nanoscale advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 103 citations in OpenAlex.
- Tunable terahertz biosensing and shielding using a graphene-enhanced dielectric resonator absorber.Scientific reports · 2025Article
- Tunable High-Sensitivity Four-Frequency Refractive Index Sensor Based on Graphene Metamaterial.Sensors (Basel, Switzerland) · 2024Article
- Multiband terahertz metamaterial perfect absorber for microorganisms detection.Scientific reports · 2023Article
- Developing a Novel Terahertz Fabry-Perot Microcavity Biosensor by Incorporating Porous Film for Yeast Sensing.Sensors (Basel, Switzerland) · 2023Article
- Graphene-based terahertz bias-driven negative-conductivity metasurface.Nanoscale advances · 2022Article
- Tunable Optimal Dual Band Metamaterial Absorber for High Sensitivity THz Refractive Index Sensing.Nanomaterials (Basel, Switzerland) · 2022Article
- Graphene-based dual-functional chiral metamirror composed of complementary 90° rotated U-shaped resonator arrays and its equivalent circuit model.Scientific reports · 2021Article
- Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared.Micromachines · 2021Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Surface plasmons generated at the graphene dielectric interface can be altered by trapping the electric charge. A technique is implemented for trapping the bipolar electric charge on the graphene surface and arranged in a desired way to enhance the performance of a monolayer graphene metamaterial based tunable, ultrathin, dual narrow band terahertz (THz) absorber. A monolayer graphene sheet placed on the dielectric substrate can provide dual-band resonance by utilizing the surface plasmons of the fundamental and third order mode index and an absorption of more than 99% and 50% can be obtained in the lower and upper band, respectively. The absorption is further enhanced to the level of perfect-absorption by utilizing the charge trapping mechanism on the graphene and generating bipolar charged nodes to create higher order surface plasmons. The multiple interference and reflection theory proves that the destructive interference in the dielectric layer is the cause of perfect absorption. The applied technique in the dual-band absorber configuration provides a tunable response which remains insensitive to the polarization and incident angle of the electromagnetic wave. The proposed perfect absorber can be utilized as a biosensor for refractive index sensing and the detection of glucose in water and the malaria virus in blood. It can provide an ultrahigh sensitivity of 14.88 THz RIU
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