Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films
Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films
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DOI：
10.1063/1.4958855
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发表时间：
2016-07-18
影响因子：
4
通讯作者：
Gensch, M.
中科院分区：
文献类型：
--
作者：
Awari, N.;Kovalev, S.;Gensch, M.
研究了金属铁磁Mn3-xGa Heusler合金纳米膜中相干激发自旋进动产生的窄带太赫兹辐射。每纳米薄膜厚度的发射效率与基于光学整流的经典激光驱动太赫兹源相当或更高。薄膜发射的中心频率可以通过薄膜成分在0.20-0.35 THz范围内精确调谐，使这种类型的金属薄膜成为高效片上太赫兹发射器的候选材料。此外，太赫兹发射光谱还被证明是超薄膜磁性能的灵敏探针。AIP出版社出版。
Narrow-band terahertz emission from coherently excited spin precession in metallic ferrimagnetic Mn3-xGa Heusler alloy nanofilms has been observed. The efficiency of the emission, per nanometer film thickness, is comparable or higher than that of classical laser-driven terahertz sources based on optical rectification. The center frequency of the emission from the films can be tuned precisely via the film composition in the range of 0.20-0.35 THz, making this type of metallic film a candidate for efficient on-chip terahertz emitters. Terahertz emission spectroscopy is furthermore shown to be a sensitive probe of magnetic properties of ultra-thin films. Published by AIP Publishing.