Enhanced terahertz Smith-Purcell radiation from subwavelength holes array within metamaterials

被引：0
|
作者：
Yu, Zijia [1 ]
Liu, Weihao [1 ]
Liu, Yucheng [1 ]
Jia, Qika [1 ]
Lu, Yalin [1 ]
机构：
[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
来源：
2019 44TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) | 2019年
关键词：
D O I：
10.1109/irmmw-thz.2019.8874465
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We propose to generate coherent terahertz radiation by using free-electron beams to excite arrays of rectangular sub-wavelength holes within metamaterials. The radiation is achieved due to the constructive interference of radiation from all sub-wavelength holes of the array via Smith-Purcell effect. Compared with that in conductor holes, the resonant modes in metamaterial holes have much higher intensity thanks to the excitation of terahertz surface plasmons. Thus, it can generate terahertz radiation with much higher intensity. Also, its radiating direction can he adjusted by changing the arrangement of array. It offers a promising way for developing efficient and steerable terahertz sources.
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页数：2
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