Related Experiment Video
Updated: Apr 15, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
15.4K
Plasmon-Enhanced Terahertz Photodetection in Graphene
Xinghan Cai1, Andrei B Sushkov1, Mohammad M Jadidi2
1†Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742-4111, United States.
Nano Letters
|April 15, 2015
Summary
We developed a novel terahertz detector using graphene microribbons to boost absorption efficiency. This device leverages tunable plasmonic resonance for enhanced performance in terahertz detection applications.
Area of Science:
- Optoelectronics
- Materials Science
- Terahertz Technology
Background:
- Terahertz (THz) detectors are crucial for various applications, including imaging and spectroscopy.
- Improving absorption efficiency in THz detectors remains a key challenge for enhanced performance.
- Graphene's unique electronic properties offer potential for novel photodetector designs.
Purpose of the Study:
- To report a large-area terahertz detector with enhanced absorption efficiency.
- To utilize tunable plasmonic resonance in graphene microribbons for improved THz detection.
- To investigate the effect of graphene ribbon orientation on detector performance.
Main Methods:
- Fabrication of subwavelength graphene microribbons on SiC(0001).
- Integration of graphene ribbons with subwavelength bimetallic electrodes.
- Tailoring the orientation of graphene ribbons relative to the electrode array.
Main Results:
- Achieved efficient excitation of plasmonic modes by incident THz waves.
- Demonstrated a photothermal voltage observable between outermost electrodes.
- Enhanced absorption efficiency due to tunable plasmonic resonance.
Conclusions:
- The developed terahertz detector shows promising performance for large-area applications.
- Tunable plasmonic resonance in graphene microribbons is an effective strategy for enhancing THz detector efficiency.
- The device design enables efficient light absorption and signal detection.
