发表机构
University of Regensburg; CNR - Istituto Officina dei Materiali (IOM)（雷根斯堡大学; 国家研究委员会材料研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究通过微波表征测量外延Al-InAs量子阱上的约瑟夫森结阵列，利用低能等离激元模式提取结参数，并展示了其在面外磁场下的可调性，为量子电路和高电感应用提供支持。
AI 中文摘要
我们展示了基于外延Al-InAs量子阱异质结构的约瑟夫森结阵列（JJAs）的微波表征测量。通过探测这些器件的低能等离激元模式，可以推导出组成平面结的约瑟夫森电感。施加面外磁场会产生类似夫琅禾费衍射的图案，从中可以提取电流-相位关系和有效透明度。JJAs可用于实现高电感，适用于量子电路的实现。它们还为研究与安德烈耶夫态相关的混合超导体-半导体器件的微观激发提供了极佳的测试平台。在此，我们展示了它们在广泛的面外磁场范围内的可调性。
英文摘要
We present microwave characterization measurements of Josephson junction arrays (JJAs) based on epitaxial Al-InAs quantum well heterostructure. The Josephson inductance of the constituent planar junctions can be derived by probing the low-energy plasmon modes of these devices. Applying an out-of-plane magnetic field gives rise to a Fraunhofer-like diffraction pattern, from which the current-phase relation and the effective transparency can be extracted. JJAs can be used to achieve high inductances, suitable for the implementation of quantum circuits. They also provide an excellent test-bed for studying the microscopic excitations of hybrid superconductor-semiconductor devices associated with the presence of Andreev states. Here, we demonstrate their tunability over a broad range of out-of-plane magnetic fields.
Comments12 pages, 7 figures
