Dispersion relation of spoof surface plasmon resonant mode on concentric annular metal corrugation
Dispersion relation of spoof surface plasmon resonant mode on concentric annular metal corrugation
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DOI：
10.1063/5.0123732
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发表时间：
2022-11
期刊：
影响因子：
1.6
通讯作者：
Y. Annaka;K. Ogura;M. Ito
中科院分区：
文献类型：
--
作者：
Y. Annaka;K. Ogura;M. Ito
在这项研究中，我们展示了近场测量欺骗表面等离子体（SSP）的波纹金属盘同心环形的波纹。SSP在磁盘的中心被激发，并由波纹表面上的针形天线探测。在测量中，SSP谐振模式附近的上限截止频率观察。从测量的参数中提取了色散关系和群速度，并与计算的色散关系有很好的对应。我们的研究结果有助于设计SSP谐振器，以提高强太赫兹波源的器件性能。
In this study, we demonstrate near-field measurement of a spoof surface plasmon (SSP) on a corrugated metal disk with concentric annular corrugation. The SSP is excited at the center of the disk and is probed by a needle antenna on the corrugated surface. In the measurement, SSP resonant modes are observed around the upper cut-off frequency. The dispersion relation and group velocity are extracted from the measured parameters and correspond well to the calculated dispersion relation. Our results help in designing SSP resonators to improve the device performance of an intense terahertz wave source.