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Updated: Feb 2, 2026
07:24
Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
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Ultrasensitive specific terahertz sensor based on tunable plasmon induced transparency of a graphene micro-ribbon
Optics Express
|November 25, 2018
Summary
We developed a novel terahertz sensor using graphene micro-ribbons that achieves ultrasensitive and specific detection of molecules. This plasmon induced transparency sensor shows great promise for advanced chemical and biological sensing applications.
Area of Science:
- Terahertz (THz) sensing technology
- Plasmonics and metamaterials
- Graphene-based devices
Background:
- Terahertz (THz) spectroscopy offers unique capabilities for non-destructive analysis.
- Developing highly sensitive and specific sensors remains a challenge in the THz region.
- Graphene's tunable electronic properties present opportunities for advanced sensor design.
Purpose of the Study:
- To propose and analyze an ultrasensitive specific terahertz sensor.
- To leverage the plasmon induced transparency (PIT) effect for enhanced sensing.
- To demonstrate specific molecule detection with high sensitivity.
Main Methods:
- Utilized two sets of graphene micro-ribbons with varying widths to induce PIT.
- Performed full-wave electromagnetic simulations to analyze sensor performance.
- Explored graphene's electrical tunability for specific molecule identification.
Main Results:
- Achieved ultrasensitive sensing in the terahertz region via the PIT effect.
- Demonstrated specific sensing of benzoic acid with a detection limit below 6.35 µg/cm².
- Validated sensor performance for thickness and refractive index sensing applications.
Conclusions:
- The proposed graphene-based PIT sensor offers a powerful platform for ultrasensitive THz sensing.
- Specific identification of analytes is achievable by tuning graphene's Fermi level.
- This technology opens new avenues for bio/chemical molecule detection in the THz range.
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