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Updated: May 28, 2026
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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Plasmonic energy collection through hot carrier extraction.
Fuming Wang1, Nicholas A Melosh
1Department of Materials Science and Engingeering, Stanford University, Stanford, California 94305, United States.
Nano Letters
|October 26, 2011
Summary
This study introduces a novel metal-insulator-metal device architecture that enhances light-to-current conversion efficiency by nearly 40 times using surface plasmon excitation. The innovative design efficiently harnesses hot electrons for power generation across a broad spectrum.
Area of Science:
- Optoelectronics
- Plasmonics
- Nanotechnology
Background:
- Efficient conversion of light into direct current is crucial for energy and photodetection technologies.
- Broadband photon frequency utilization remains a significant challenge in current light-to-current conversion methods.
Purpose of the Study:
- To present a novel metal-insulator-metal device architecture for enhanced light-to-current conversion.
- To investigate the role of surface plasmon excitation and hot electron generation in power conversion.
- To demonstrate significant theoretical and experimental power conversion efficiency enhancements.
Main Methods:
- Utilized surface plasmon excitation within a metal-insulator-metal device structure.
- Investigated spatial confinement of electron excitation through plasmon absorption.
- Conducted theoretical estimations of power conversion efficiency and experimental device measurements.
Main Results:
- Achieved a theoretical power conversion efficiency enhancement of nearly 40 times compared to direct illumination.
- Demonstrated efficient operation across a broad spectrum, from infrared to visible wavelengths.
- Experimental measurements confirmed clear rectification and power conversion behavior in the fabricated devices.
Conclusions:
- The proposed plasmonic device architecture offers a significant advancement in light-to-current conversion efficiency.
- This technology holds promise for improved energy conversion and photodetection applications.
- The findings highlight the potential of engineered plasmonic interactions for novel optoelectronic devices.
