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Updated: Feb 6, 2026

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
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Design and performance of a terahertz absorber based on patterned graphene
Optics Letters
|August 31, 2018
Summary
Researchers developed a graphene-based terahertz (THz) absorber for stealth target detection. This THz absorber demonstrates tunable absorption performance and broad bandwidth, offering potential as an effective electromagnetic countermeasure.
Area of Science:
- Photonics and Optics
- Materials Science
- Electromagnetics
Background:
- Terahertz (THz) technology provides high resolution for target detection, posing a threat to stealth capabilities.
- THz absorbers are crucial for electromagnetic countermeasures against advanced detection systems.
Purpose of the Study:
- To design, fabricate, and characterize a novel THz absorber utilizing patterned graphene.
- To investigate the tunability and bandwidth of graphene-based THz absorbers for enhanced performance.
Main Methods:
- Graphene patterning via transfer, photolithography, and etching techniques.
- Fabrication and experimental characterization of the THz absorber.
- Electromagnetic simulations to analyze absorber performance and absorption mechanisms.
Main Results:
- Simulations indicate improved absorber performance and broadened absorption bandwidth with increased Fermi energy.
- Achieved an effective bandwidth of 1.54–2.23 THz for absorption ≥90%, with a relative bandwidth (RBW) of 36.6%.
- Experimental results showed good agreement with simulations regarding resonant frequency, despite slight deviations in RBW.
Conclusions:
- The patterned graphene THz absorber exhibits tunable absorption and significant bandwidth, suitable for electromagnetic countermeasures.
- The destructive interference theory effectively explains the absorption mechanism.
- This work advances the design, fabrication, and application of graphene-based THz absorbers.
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