Spin valve as THz emitter providing amplitude modulation
Source abstract
Abstract
We present a novel spin-valve THz emitter composed of FeCo/TbCo2/FeCo tri-layers separated by a copper spacer, designed to provide amplitude modulation of THz radiation. The distinct coercivities of the magnetic layers enable magnetic field control of the THz emission, with the final amplitude formed by the interference of THz waves from the individual tri-layers. Experimental studies using time-domain spectroscopy reveal that the spin-valve structure, optimized for in-plane magnetic anisotropy, effectively modulates the THz signal and maintains constant polarization. Although the current optical-to-THz conversion efficiency is insufficient for commercial use, the findings offer crucial insights for enhancing efficiency through structural optimization, highlighting the potential for advanced THz emitters and modulators.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Terahertz technology and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
MIREA - Russian Technological University 1 , Moscow 119454,
University of Lille, CNRS, Centrale Lille, Université Polytechnique Hauts-de-France, UMR 8520 - IEMN 2 , 59000 Lille,
Prokhorov General Physics Institute of RAS 3 , Moscow 119991,
Funding
Russian Science Foundation · Ministry of Science and Higher Education of the Russian Federation
References (35)
Show source-provided references
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