用于700 GHz和1.3 THz之间的外差混频器的改进的Nb SIS器件，其具有使用普通金属能量弛豫层的NbTiN传输线
Improved Nb SIS devices for heterodyne mixers between 700 GHz and 1.3 THz with NbTiN transmission lines using a normal metal energy relaxation layer
摘要：
在本文中，我们实验演示了一个铝氧化物隧道势垒，嵌入在一个高间隙超导铌钛氮化物电路的铌三层结的实施。先前报道的加热准粒子捕获被删除插入之间的铌结和铌钛氮化物层的正常金属层的金。我们在直流表征测量中分析了具有不同金层厚度和形状的各种器件几何形状中的非平衡准粒子的冷却。我们的工作的结论与备注为未来的外差混频器实验使用我们的设备技术。
英文摘要：
In this paper we demonstrate experimentally the implementation of a niobium-trilayer junction with an aluminum-oxide tunnel barrier, embedded in a high-gap superconducting niobium-titanium-nitride circuit. Previously reported heating by quasiparticle trapping is removed by inserting a normal metal layer of gold between the niobium junction and the niobium-titanium-nitride layer. We analyze in dc-characterization measurements the cooling of the nonequilibrium quasiparticles in various device geometries having different gold layer thickness and shape. Our work is concluded with remarks for future heterodyne mixer experiments using our device technology.
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