Surface field excitation by an obliquely incident wave
Surface field excitation by an obliquely incident wave
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DOI：
10.1063/1.4801759
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发表时间：
2013-04
影响因子：
4
通讯作者：
I. Konoplev;A. Phipps;A. Phelps;C. Robertson;K. Ronald;A. Cross
中科院分区：
文献类型：
--
作者：
I. Konoplev;A. Phipps;A. Phelps;C. Robertson;K. Ronald;A. Cross
观察圆柱形二维周期性表面晶格内倾斜入射波的表面场激发是向太赫兹切伦科夫放大器迈出的一步。在这里，我们观察并讨论这一现象，并使用不同的方法对其进行研究。比较结果表明，晶格对比度的增加导致斜入射波激发表面场，从而形成本征模。通过研究信号的前向传输来进行测量，结果表明测量到的光谱间隙与本征模形成相关，而不是与带隙建立相关。
Observation of surface field excitation by an obliquely incident wave inside a cylindrical two-dimensional periodic surface lattice is a step forward toward THz Cherenkov amplifiers. Here we observe and discuss this phenomenon, investigating it using different approaches. The results are compared, and it is shown that an increase in the lattice contrast results in excitation of surface fields by an obliquely incident wave resulting in the eigenmode formation. Measurements were conducted by studying forward transmission of the signal, and it is shown that the measured gaps in the spectra are associated with the eigenmode formation rather than band gap establishment.