Related Experiment Video
Updated: May 8, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Plasmonic photoconductive detectors for enhanced terahertz detection sensitivity
Ning Wang1, Mohammad R Hashemi, Mona Jarrahi
1Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, 1301 Beal Ave, Ann Arbor, MI 48109, USA.
Optics Express
|August 14, 2013
Summary
This study introduces a novel photoconductive terahertz detector using plasmonic contact electrodes. This advancement significantly enhances terahertz detection sensitivity, offering over 30x improvement compared to conventional detectors.
Area of Science:
- Terahertz (THz) technology
- Plasmonics
- Optoelectronics
Background:
- Photoconductive terahertz detectors face a trade-off between quantum efficiency and operational speed.
- Conventional detectors exhibit limitations in sensitivity and performance.
Purpose of the Study:
- To develop a photoconductive terahertz detector with enhanced sensitivity and performance.
- To mitigate the inherent trade-offs in traditional photoconductive terahertz detector designs.
Main Methods:
- Fabrication of photoconductive detectors with and without plasmonic contact electrode gratings.
- Characterization using a time-domain terahertz spectroscopy setup.
- Comparative analysis under identical operating conditions.
Main Results:
- Plasmonic contact electrodes significantly improve terahertz detection sensitivity.
- The developed detector demonstrated over 30 times higher sensitivity compared to conventional designs.
- Enhanced performance was observed across the 0.1-1.5 THz frequency band.
Conclusions:
- Plasmonic electrodes effectively overcome the limitations of conventional photoconductive terahertz detectors.
- The novel detector design offers a substantial leap in terahertz detection capabilities.
- This technology holds promise for advanced terahertz spectroscopy and imaging applications.
