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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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High-Performance THz Emitters Based on Ferromagnetic/Nonmagnetic Heterostructures
Yang Wu1, Mehrdad Elyasi1, Xuepeng Qiu2,3
1Department of Electrical and Computer Engineering and NUSNNI-NanoCore, National University of Singapore, 117576, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|November 26, 2016
Summary
Researchers developed a low-cost, flexible terahertz (THz) emitter using metallic heterostructures. This device utilizes the inverse spin Hall Effect for efficient THz generation, offering potential for new THz equipment and material characterization.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Terahertz (THz) technology requires efficient and controllable emission sources.
- Spintronic phenomena offer novel pathways for electromagnetic wave generation.
Purpose of the Study:
- To demonstrate a low-cost, flexible, and controllable THz emitter.
- To explore the application of the inverse spin Hall Effect in THz emission.
- To provide a new method for characterizing spin-orbit interaction.
Main Methods:
- Fabrication of thin nonmagnetic/ferromagnetic metallic heterostructures.
- Utilizing the inverse spin Hall Effect for THz emission generation.
- Characterization of THz emission properties, including intensity, bandwidth, and controllability.
Main Results:
- Successful demonstration of a low-cost, intense, broadband, and noise-resistive THz emitter.
- Achieved magnetic field controllability and low power operation.
- Verified THz emission originating from the inverse spin Hall Effect.
Conclusions:
- The developed THz emitter is a promising candidate for various THz applications.
- The device offers an alternative approach for probing spin-orbit interactions in material bilayers.
