Phonon-Related Monochromatic THz Radiation and its Magneto-Modulation in 2D Ferromagnetic Cr(2) Ge(2) Te(6).
Phonon-Related Monochromatic THz Radiation and its Magneto-Modulation in 2D Ferromagnetic Cr(2) Ge(2) Te(6).
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DOI：
10.1002/advs.202103229
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发表时间：
2022-01
期刊：
影响因子：
--
通讯作者：
Sheng Z
中科院分区：
文献类型：
--
作者：
Cheng L;Li H;Lin G;Yan J;Zhang L;Yang C;Tong W;Ren Z;Zhu W;Cong X;Gao J;Tan P;Luo X;Sun Y;Zhu W;Sheng Z
寻找多种类型的太赫兹辐射源是太赫兹技术的关键。除了传统的费米子情况，玻色子准粒子也承诺能量有效的太赫兹波发射。在这里，通过利用2D铁磁Cr2 Ge 2 Te 6晶体，第一个声子相关的磁可调谐单色太赫兹辐射源被证明。在低光子能量宽带THz泵浦下，可以产生频率为<$0.9THz、带宽为<$0.25THz的强THz辐射，在160 K时其转换效率甚至可以达到2.1%。此外，有趣的是，发现这种单色THz辐射可以有效地调制低于160 K的外磁场。根据实验和理论分析，出射的THz辐射被识别为来自声子极化激元的发射，其温度和磁场依赖行为证实了这种2D铁磁晶体中的大的自旋晶格耦合。这些观测结果为可调谐单色太赫兹光源的产生提供了一条新的途径，在光子学和自旋电子学器件的未来应用中可能具有巨大的实际意义。针对目前通用太赫兹辐射源辐射效率低的问题，研制了一种基于货车瓦铁磁半导体的高效单色太赫兹辐射源。它利用了玻色子准粒子，声子极化激元，通过激发太赫兹光子和Cr2 Ge 2 Te 6中固有的层间声子耦合。辐射也可以被外部磁场有效地调制。
Searching multiple types of terahertz (THz) irradiation source is crucial for the THz technology. In addition to the conventional fermionic cases, bosonic quasi‐/particles also promise energy‐efficient THz wave emission. Here, by utilizing a 2D ferromagnetic Cr2Ge2Te6 crystal, first a phonon‐related magneto‐tunable monochromatic THz irradiation source is demonstrated. With a low‐photonic‐energy broadband THz pump, a strong THz irradiation with frequency ≈0.9 THz and bandwidth ≈0.25 THz can be generated and its conversion efficiency could even reach 2.1% at 160 K. Moreover, it is intriguing to find that such monochromatic THz irradiation can be efficiently modulated by external magnetic field below 160 K. According to both experimental and theoretical analyses, the emergent THz irradiation is identified as the emission from the phonon‐polariton and its temperature and magnetic field dependent behaviors confirm the large spin‐lattice coupling in this 2D ferromagnetic crystal. These observations provide a new route for the creation of tunable monochromatic THz source which may have great practical interests in future applications in photonic and spintronic devices. To addressing the challenge of low radiation efficiency of current universal terahertz sources, a van der Waals ferromagnetic semiconductor‐based efficient monochromatic terahertz radiation is developed here. It takes advantage of the bosonic quasi‐particles, phonon‐polaritons, that be coupled by exciting terahertz photons and inherent inter‐layered phonons in Cr2Ge2Te6. The radiation could also be effectively modulated by external magnetic fields.
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DOI：
10.1002/pssb.200303160
发表时间：
2003-08-01
期刊：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
影响因子：
--
作者：
Kira, M;Hoyer, W;Koch, SW
通讯作者：
Koch, SW
影响因子：
16.6
作者：
Gubbin, Christopher R.;Berte, Rodrigo;De Liberato, Simone
通讯作者：
De Liberato, Simone
影响因子：
9.8
作者：
de Jong, Maarten;Chen, Wei;Angsten, Thomas;Jain, Anubhav;Notestine, Randy;Gamst, Anthony;Sluiter, Marcel;Ande, Chaitanya Krishna;van der Zwaag, Sybrand;Plata, Jose J.;Toher, Cormac;Curtarolo, Stefano;Ceder, Gerbrand;Persson, Kristin A.;Asta, Mark
通讯作者：
Asta, Mark
基于 Fe 3 GeTe 2 范德华同质结的从两态到多态垂直自旋阀，无间隔层
影响因子：
18.9
作者：
Hu, Ce;Zhang, Dong;Wang, Kaiyou
通讯作者：
Wang, Kaiyou
影响因子：
2.6
作者：
Bai, Long;Zhang, Zheng-Zhong;Jiang, Liang
通讯作者：
Jiang, Liang