Terahertz generation from surface plasmon polaritons in graphene induced by a moving electron beam
Terahertz generation from surface plasmon polaritons in graphene induced by a moving electron beam
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DOI：
10.1016/j.optcom.2015.02.038
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发表时间：
2015-07
影响因子：
2.4
通讯作者：
Tian Bo Tan;G. Ren;L. Ying;Y. Wang;Jianquan Yao
中科院分区：
文献类型：
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作者：
Tian Bo Tan;G. Ren;L. Ying;Y. Wang;Jianquan Yao
本文从理论上研究了电子束在石墨烯片上运动时产生的THz辐射。数值计算结果表明，通过调节费米能级或介质柱的填充率，THz辐射频率可以在10 THz的范围内变化，辐射强度峰值在10−3μJ/cm 2量级，这在很大程度上取决于电子束速度。这些结果表明，在太赫兹辐射源的发展有着广阔的应用前景。
We studied theoretically the THz radiation emission induced by an electron beam moving atop a graphene sheet based on a structure consisting of 2D square lattice of dielectric cylinders. Numerical evaluation result shows that the THz radiation frequency can be turned in a range of 10 THz by adjusting the Fermi level or the filling fraction of the dielectric cylinders, and the peak radiation intensity, which largely depends on the velocity of the electron beam, is the order of 10−3μJ/cm2. These results indicate a promising application in developing the THz radiation source.