Twin-Slot Antenna Coupled NbN Hot Electron Bolometer Mixer at 2.5 THz
Twin-Slot Antenna Coupled NbN Hot Electron Bolometer Mixer at 2.5 THz
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DOI：
10.1109/tthz.2011.2145330
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发表时间：
2011-05
影响因子：
3.2
通讯作者：
Wen Zhang;Jiansong Gao;M. Hajenius;W. Miao;P. Khosropanah;T. Klapwijk;S. Shi
中科院分区：
文献类型：
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作者：
Wen Zhang;Jiansong Gao;M. Hajenius;W. Miao;P. Khosropanah;T. Klapwijk;S. Shi
我们展示了一个准光学NbN热电子测辐射热计（HEB）混频器使用双缝天线上的硅透镜耦合太赫兹辐射。混频器在2.5 THz下显示出1150 K的接收器噪声温度，这是基于包括量子噪声的模型所预期的。通过考虑主波束效率和由于测辐射热计和传输线之间的几何变化而引起的寄生电抗来理解所测量的直接响应。混频器的测量光束几乎是准直的，并且具有90%的高斯光束效率，旁瓣低于-16dB。
We demonstrate a quasi-optical NbN hot electron bolometer (HEB) mixer using a twin-slot antenna on a Si lens to couple terahertz radiation. The mixer shows a receiver noise temperature of 1150 K at 2.5 THz, which is expected based on a model that includes quantum noise. The measured direct response is understood by taking into account the main beam efficiency and the parasitic reactance due to the geometric change between bolometer and transmission line. The measured beam of the mixer is nearly collimated and has a Gaussian beam efficiency of 90% with side-lobes below -16 dB.