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Updated: Aug 9, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
14.9K
Terahertz large-area unidirectional surface magnetoplasmon and its applications
Qian Shen1,2, Jinhua Yan1, Yun You1
1College of Science, Zhejiang University of Technology, Hangzhou, 310023, China.
Scientific Reports
|December 11, 2023
Summary
We demonstrate large-area unidirectional surface magnetoplasmons (USMPs) in a novel metal-UENZ-Si-InSb structure. These USMPs offer reduced leakage and efficient free-space excitation for terahertz plasmonic devices.
Area of Science:
- Plasmonics
- Terahertz technology
- Metamaterials
Background:
- Nonreciprocal surface waves in plasmonic platforms with nonlocal effects are complex.
- Achieving unidirectional surface magnetoplasmons (USMPs) with large modal areas has been challenging.
Purpose of the Study:
- To present a scheme for achieving large-area USMPs (LUSMPs) at terahertz frequencies.
- To investigate the properties and potential applications of these LUSMPs.
Main Methods:
- Utilized a metal-UENZ (uniaxial-[Formula: see text]-near-zero)-Si-InSb structure.
- Included nonlocal effects and an external magnetic field.
- Analyzed the field distribution and leakage characteristics of the LUSMPs.
Main Results:
- Demonstrated LUSMPs with large modal areas, extending uniformly in the UENZ layer.
- Significantly reduced nonlocality-induced leakage by an order of magnitude compared to previous structures.
- Showcased efficient excitation of LUSMPs by terahertz radiation from free space.
Conclusions:
- LUSMPs in the proposed structure offer enhanced performance and reduced leakage.
- These LUSMPs provide a platform for manipulating terahertz waves, enabling applications like energy squeezing and trapping.
- Developed a terahertz free-space isolator based on LUSMPs, indicating potential for innovative terahertz plasmonic devices.
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