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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
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Broadband Terahertz Generation via the Interface Inverse Rashba-Edelstein Effect
1State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, China.
Physical Review Letters
|September 8, 2018
Summary
Researchers developed novel terahertz (THz) emitters using the interface inverse Rashba-Edelstein effect in engineered Ag/Bi Rashba interfaces. This breakthrough enables controllable broadband THz radiation for next-generation applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Terahertz (THz) frequency regime is crucial for next-generation broadband emitters.
- Novel nanoscale emission mechanisms are under intense investigation.
- The interface inverse Rashba-Edelstein effect is a promising avenue for THz emission.
Purpose of the Study:
- To report broadband THz emission utilizing the interface inverse Rashba-Edelstein effect.
- To demonstrate controllable THz radiation waveform from engineered metallic heterostructures.
- To explore the superposition of THz emission mechanisms.
Main Methods:
- Engineering the symmetry of the Ag/Bi Rashba interface.
- Utilizing photoexcitation of metallic Fe/Ag/Bi heterostructures.
- Analyzing THz radiation waveforms and film thickness dependence.
Main Results:
- Demonstrated controllable broadband THz radiation (approximately 0.1-5 THz) via the interface inverse Rashba-Edelstein effect.
- Observed selective superposition of THz emission from the interface inverse Rashba-Edelstein effect and the inverse spin Hall effect.
- Revealed a unique film thickness dependent emission pattern.
Conclusions:
- The engineered Ag/Bi Rashba interface provides a versatile platform for broadband THz radiation.
- Interface quantum effects offer new opportunities for controlling THz emission.
- This work paves the way for advanced THz emitter development.
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