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Spintronic terahertz emission with manipulated polarization (STEMP) |
Peiyan Li1, Shaojie Liu2, Xinhou Chen1, Chunyan Geng1, Xiaojun Wu1,2,3( ) |
1. School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
2. School of Cyber Science and Technology, Beihang University, Beijing 100191, China
3. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract Highly efficient generation and arbitrary manipulation of spin-polarized terahertz (THz) radiation will enable chiral lightwave driven quantum nonequilibrium state regulation, induce new electronic structures, consequently provide a powerful experimental tool for investigation of nonlinear THz optics and extreme THz science and applications. THz circular dichromic spectroscopy, ultrafast electron bunch manipulation, as well as THz imaging, sensing, and telecommunication, also need chiral THz waves. Here we review optical generation of circularly-polarized THz radiation but focus on recently emerged polarization tunable spintronic THz emission techniques, which possess many advantages of ultra-broadband, high efficiency, low cost, easy for integration and so on. We believe that chiral THz sources based on the combination of electron spin, ultrafast optical techniques and material structure engineering will accelerate the development of THz science and applications.
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| Keywords
Terahertz (THz) emission
Femtosecond laser
Spintronics
Polarization manipulation
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Corresponding Author(s):
Xiaojun Wu
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Issue Date: 06 May 2022
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