High-Tc Josephson Junction Arrays for THz Applications

被引：2

作者：

Hanisch, Dominik ^{[1
]}

Proepper, Max ^{[1
]}

Ritter, Paul Julius ^{[1
]}

Tollkuehn, Marco ^{[1
]}

Schilling, Meinhard ^{[1
]}

Hampel, Benedikt ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Elekt Messtech & Grundlagen Elektrotech, D-38106 Braunschweig, Germany

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2023年 / 33卷 / 05期

关键词：

Josephson junction; HTS; YBCO; Ga-FIB; shapiro step; terahertz; voltage standard; SUPERCONDUCTING TRANSPORT-PROPERTIES; GRAIN-BOUNDARIES;

D O I：

10.1109/TASC.2023.3257285

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

High-T-c superconductors (HTS) like yttrium barium copper oxide (YBa2Cu3O7-x) pave the way towards readily available and precise voltage standards at liquid nitrogen temperatures. They can be driven by terahertz radiation, thus achieving higher output voltages with a significantly reduced junction count. The reduced effort in cooling also simplifies the overall application. The use of a gallium focused ion beam (Ga-FIB) represents a promising method to tailor the geometry of Josephson junctions after conventional patterning of an array to tune the junction parameters individually. In this work, we present a Josephson junction array made from the HTS YBa2Cu3O7-x based on grain-boundary Josephson junctions. The junction parameters are investigated and afterwards the influence of the Ga-FIB on the junctions is examined. This serves as an important step to show the suitability of this process for HTS voltage standards. Furthermore, the high frequency properties of the array and the associated Shapiro steps are characterized in the terahertz range. This technique represents an important step towards versatile HTS voltage standards.

引用

页数：5

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