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Enhanced directive terahertz radiation emission from a horn antenna-coupled W/Fe/Pt spintronic film stack
Applied Physics Letters ( IF 4 ) Pub Date : 2021-08-30 , DOI: 10.1063/5.0061055
B. Y. Shahriar 1 , B. N. Carnio 1 , E. Hopmann 1 , A. Y. Elezzabi 1
Affiliation  

We demonstrate enhanced directive terahertz (THz) radiation emission from a horn-antenna coupled spintronic THz radiation emitter without the use of additional lenses. The waveguide-fed horn antenna is fabricated using 3D lithography and is coupled directly to the THz-emitting film serving to direct the highly divergent THz radiation emitted by the spintronic THz radiation emitter. The antenna-coupled emitter provides a 19.6 dB increase in the measured signal power at 1.5 THz compared to a bare emitter. Finite-difference time-domain simulations are conducted to gain insight into the behavior of the antenna at different frequencies, providing results that match those observed experimentally. Our device is well suited for platforms where footprint size is a constraint and can be modified to act as a directive bandpass filter.

中文翻译:

来自喇叭天线耦合 W/Fe/Pt 自旋电子薄膜堆栈的增强定向太赫兹辐射发射

我们展示了来自喇叭天线耦合自旋电子太赫兹辐射发射器的增强型定向太赫兹 (THz) 辐射发射,而无需使用额外的透镜。波导馈电喇叭天线是使用 3D 光刻制造的,并直接耦合到太赫兹发射薄膜,用于引导自旋电子太赫兹辐射发射器发射的高度发散的太赫兹辐射。与裸发射器相比,天线耦合发射器在 1.5 THz 时测量的信号功率增加了 19.6 dB。进行有限差分时域仿真以深入了解天线在不同频率下的行为,提供与实验观察到的结果相匹配的结果。我们的设备非常适合封装尺寸受限的平台,并且可以进行修改以充当定向带通滤波器。
更新日期:2021-09-03
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