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Updated: May 14, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
High-Performance Terahertz Detection via Quasi-2D Perovskite/Weyl Semimetal Heterojunction
Chao Feng1, Baoxing Liu1, Haoyi Ning1
1School of Physical Science and Information Technology, Liaocheng University, Liaocheng 252059, China.
Materials (Basel, Switzerland)
|May 13, 2026
Summary
Researchers developed a novel quasi-2D perovskite/Weyl semimetal heterojunction terahertz (THz) detector. This device offers high sensitivity and fast response for advanced THz applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Optoelectronics
Background:
- Terahertz (THz) radiation holds promise for communication, imaging, and spectroscopy.
- Current THz detector development faces challenges in sensitivity, response speed, and stability.
Purpose of the Study:
- To engineer a high-performance THz detector by combining perovskite and Weyl semimetal properties.
- To overcome limitations of existing THz detector technologies.
Main Methods:
- Fabrication of a quasi-2D perovskite/Weyl semimetal (Co3Sn2S2) heterojunction.
- Band engineering to optimize material properties for THz detection.
Main Results:
- Achieved responsivity of 374.15 A/W and specific detectivity of 6.27 × 10^11 cm·Hz^1/2·W^-1 at 0.1 THz.
- Demonstrated noise-equivalent power of 0.29 pW·Hz^-1/2.
- Attributed performance to synergistic effects of perovskite absorption and Co3Sn2S2 carrier mobility/topological states.
Conclusions:
- The heterojunction design enables efficient THz absorption and ultrafast carrier extraction.
- This approach offers a new strategy for developing next-generation portable and integrated THz devices.
