High kinetic inductance NbTiN superconducting transmission line resonators in the very thin film limit
High kinetic inductance NbTiN superconducting transmission line resonators in the very thin film limit
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DOI：
10.1063/5.0100961
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发表时间：
2022-08-01
影响因子：
4
通讯作者：
Lu, Tzu-Ming
中科院分区：
文献类型：
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作者：
Bretz-Sullivan, Terence M.;Lewis, Rupert M.;Lu, Tzu-Ming
我们在高温极限下（光子能量小于热能）研究了由厚度小于12纳米的极薄NbTiN薄膜构成的超导传输线谐振器的直流（DC）和射频（RF）响应。这些超导谐振器的谐振频率作为射频输入功率的函数呈现出显著的非线性响应，在最薄的薄膜中，在 - 20 dB的范围内，频移可接近Δf = - 0.15%。这种强烈的非线性响应使得这些极薄薄膜谐振器能够用作高动生电感参量放大器。由美国物理联合会出版社独家授权发表。
We examine the DC and radio frequency (RF) response of superconducting transmission line resonators comprised of very thin NbTiN films, < 12 nm in thickness, in the high-temperature limit, where the photon energy is less than the thermal energy. The resonant frequencies of these superconducting resonators show a significant nonlinear response as a function of RF input power, which can approach a frequency shift of delta f = - 0.15 % in a - 20 dB span in the thinnest film. The strong nonlinear response allows these very thin film resonators to serve as high kinetic inductance parametric amplifiers. Published under an exclusive license by AIP Publishing.