偶极子天线
光学
等离子体子
辐射模式
天线(收音机)
激发
太赫兹辐射
光电子学
偶极子
物理
材料科学
电信
工程类
量子力学
作者
Thi Thanh Kieu Nguyen,Quang Minh Ngo,Truong Khang Nguyen
出处
期刊:The Applied Computational Electromagnetics Society Journal (ACES)
日期:2017-01-01
卷期号:: 634-641
被引量:6
摘要
In this paper, we investigate the near-field enhanced optical absorption and far-field radiation characteristics of plasmonic dipole nano-antenna with different geometries which are rectangular, square, circular, and ellipse dipoles. Localized E-field enhancement at the excitation gap and reflection profile in an infinite 2D array of each nano-antenna are characterized and optimized at the resonant frequency of 375 THz, which corresponds to the incident wavelength of 800 nm. Numerical results show that the ellipse nano-antenna produces the most enhanced electric field at the excitation gap whereas the circular nano-antenna yields the best reflection and far-field radiation characteristics. This research is useful for the researchers and designers in choosing appropriate plasmonic dipole nano-antennas when incorporating with a photoconductive antenna for terahertz radiation enhancement.
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