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4 October 2024 THz pulse shaping using spintronic: III/V semiconductor hybrid and microstructured spintronic emitters
Weipeng Wu, Sergi Lendinez, Wilder Acuna, Mojtaba T. Kaffash, Zhixiang Huang, Subhash Bhatt, Richard D. Schaller, Haidan Wen, John Q. Xiao, Xi Wang, Joshua Zide, Matthew Doty, Lars Gundlach, Banjamin M. Jungfleisch
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Proceedings Volume PC13119, Spintronics XVII; PC131190Y (2024) https://doi.org/10.1117/12.3027822
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
Over the past decade, terahertz electromagnetic waves with sub-millimeter wavelength (30 µm to 3 mm) have attracted much attention due to the wide range of applications in medical and industrial fields. Magnetic thin film heterostructures (spintronic emitters) consisting of ferromagnet and nonmagnetic metal layers have recently emerged as broadband THz sources that may have advantages over conventional sources such as photoconductive antennas (PCA) and nonlinear crystals. Here, we demonstrate how to use spintronic emitters patterned into microstructures of different geometries and dimensions to modify the characteristic electromagnetic spectrum of the emitted THz waves. Furthermore, we theoretically explore the possibility of combining emergent spintronic emitters with conventional PCA as hybrid emitters for THz pulse shaping and controlling the handedness of the polarization of THz waves. This new method takes advantage of the broad bandwidth of spintronic emitters and high-intensity THz emission at the low frequency of PCAs. These modelings are confirmed by preliminary experiments. Our results are beneficial to the production of functional THz devices with tunable parameters.
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Weipeng Wu, Sergi Lendinez, Wilder Acuna, Mojtaba T. Kaffash, Zhixiang Huang, Subhash Bhatt, Richard D. Schaller, Haidan Wen, John Q. Xiao, Xi Wang, Joshua Zide, Matthew Doty, Lars Gundlach, and Banjamin M. Jungfleisch "THz pulse shaping using spintronic: III/V semiconductor hybrid and microstructured spintronic emitters", Proc. SPIE PC13119, Spintronics XVII, PC131190Y (4 October 2024); https://doi.org/10.1117/12.3027822
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KEYWORDS
Terahertz radiation
Spintronics
Pulse shaping
Semiconductors
Magnetic semiconductors
Principal component analysis
Optical lithography
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