使用NbTiN超导谐振器的600-700 GHz片上滤波器组spectroscopy
On-chip filter bank spectroscopy at 600-700 GHz using NbTiN superconducting resonators
摘要:
我们实验证明了一个芯片上的亚毫米波滤波器组光谱仪的原理,使用超导微谐振器作为窄带分离滤波器。该滤波器是由NbTiN/SiNx/NbTiN微带线谐振器,它具有在614-685 GHz的范围内的谐振频率-两个数量级的频率比目前研究的电路量子电动力学和光电探测器中使用的高。滤波器的频率分辨率随着频率的增加而从350降低到140,这很可能受到谐振器耗散的限制。
英文摘要:
We experimentally demonstrate the principle of an on-chip submillimeter wave filter bank spectrometer, using superconducting microresonators as narrow band-separation filters. The filters are made of NbTiN/SiNx/NbTiN microstrip line resonators, which have a resonance frequency in the range of 614-685 GHz---two orders of magnitude higher in frequency than what is currently studied for use in circuit quantum electrodynamics and photodetectors. The frequency resolution of the filters decreases from 350 to 140 with increasing frequency, most likely limited by dissipation of the resonators.
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