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Large-area superconducting nanowires fabricated based on laser exposure on photoresist

Nano Research 2024年第9期17卷 8220-8225页

作者： Han Zhou Shangqing Li Yicong Huang Wenqian Liu Haohui Zhang Yao Wu Wenzhi Zhang Enhua Chen Chaoyun Zhang Xiaoliang Wang Daqian Liu Jianxin Lin Qingdao Innovation and Development Center of Harbin Engineering University Qingdao 266000China College of Intelligent systems and Engineering Harbin Engineering UniversityHarbin 150000China

To realize large-scale micro/nanofabrication process in superconducting devices,the nano laser direct writing(NLDW)as a potential tool was *** this paper,thermal effect induced laser-matter(superconducting film)interaction based on laser direct writing on Nb films and laser exposure on photoresist were investigated by simulation and *** avoid nanoscale thermal effect on superconducting films,large-scale superconducting nanoarrays with the area up to 100μm×100μm based on laser exposure on photoresist were *** with laser direct writing on superconducting films,which lead to the degradation of superconducting performance such as critical current,transition temperature,the superconducting nanoarrays based on laser exposure on photoresist maintain excellent superconducting performance without *** that,by further optimizing the process parameters and the thickness of photoresist,the nanowires with the width down to nanometers are *** with the traditional electron beam and ion beam process,to some extent,the nanowires fabrication process based on NLDW provides a more efficient and cost-effective path for the fabrication of large-area superconducting devices/circuits.

关键词： nano laser direct writing(NLDW) superconducting nanowire arrays superconducting devices light-matter interaction

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Gate-controlled supercurrent effect in dry-etched Dayem bridges of non-centrosymmetric niobium rhenium

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Nano Research 2024年第7期17卷 6575-6581页

作者： Jennifer Koch Carla Cirillo Sebastiano Battisti Leon Ruf Zahra Makhdoumi Kakhaki Alessandro Paghi Armen Gulian Serafim Teknowijoyo Giorgio De Simoni Francesco Giazotto Carmine Attanasio Elke Scheer Angelo Di Bernardo Department of Physics University of KonstanzUniversitätsstraße 1078464 KonstanzGermany CNR-Spin c/o Universitàdegli Studi di Salernovia Giovanni Paolo II 13284084 Fisciano(SA)Italy NEST Istituto Nanoscienze-CNR and Scuola Normale SuperiorePiazza San Silvestro 1256127 PisaItaly Dipartimento di Fisica“E.R.Caianiello” Universitàdegli Studi di SalernoVia Giovanni Paolo II 13284084 Fisciano(SA)Italy Advanced Physics Laboratory Institute for Quantum StudiesChapman UniversityBurtonsvilleMD 20866USA

The application of a gate voltage to control the superconducting current flowing through a nanoscale superconducting constriction,named as gate-controlled supercurrent(GCS),has raised great interest for fundamental and technological *** gain a deeper understanding of this effect and develop superconducting technologies based on it,the material and physical parameters crucial for the GCS effect must be ***-down fabrication protocols should also be optimized to increase device scalability,although studies suggest that top-down fabricated devices are more resilient to show a ***,we investigate gated superconducting nanobridges made with a top-down fabrication process from thin films of the noncentrosymmetric superconductor niobium rhenium with varying ratios of the constituents(NbRe).Unlike other devices previously reported and made with a top-down approach,our NbRe devices systematically exhibit a GCS effect when they were fabricated from NbRe thin films with small grain size and etched in specific *** observations pave the way for the realization of top-down-made GCS devices with high *** results also imply that physical parameters like structural disorder and surface physical properties of the nanobridges,which can be in turn modified by the fabrication process,are crucial for a GCS observation,providing therefore also important insights into the physics underlying the GCS effect.

关键词： superconductivity non-centrosymmetric superconductors superconducting devices gated devices gate-controlled supercurrent top-down fabrication

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Design and Optimization of Communication System Based on superconducting Three-Energy-Level System

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Journal of Communications and Information Networks 2023年第1期8卷 57-70页

作者： Zhang Junyu Gong Chen Li Shangbin Zhu Jinkang Key Laboratory of WirelessOptical Communications Chinese Academy of Sciencesthe School of Information Science and TechnologyUniversity of Science and Technology of ChinaHefei 230000China.

We propose aΛ-type superconducting three-energy-level device-based communication system for extremely weak microwave communication scenarios,for example,long-distance deep-space *** provide a system diagram and propose the frame synchronization and power estimation approaches based on pre-defined synchronization *** on the microwave response characteristics of the superconducting three-energy-level system,we further investigate the optimization of synchronization sequence and information symbol *** show that three-energy-level systems with weak Markovianity can be approximated using independent identical distribution methods to obtain optimal synchronization sequences,and the optimal modulation is *** proposed system design and optimization approaches are evaluated by numerical ***,we investigate the performance of the three-energy-level communication system in the presence of *** results show that the three-energy-level communication system can tolerate more than 10 dB interference compared to long term evolution(LTE)systems and achieve the same communication rate for the same bandwidth and temperature.

关键词： microwave photon detection Λ-type threeenergy-level system superconducting devices energy-level transition

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Improvement in bias current redistribution in superconducting strip ion detectors with parallel configuration

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Chinese Physics B 2015年第9期24卷 562-565页

作者： Nobuyuki Zen Go Fujii Shigetomo Shiki Masahiro Ukibe Masaki Koike Masataka Ohkubo National Institute of Advanced Industrial Science and Technology (AIST)

In time-of-flight mass spectrometry（TOF MS）, superconducting strip ion detectors（SSIDs） in the parallel configuration are promising for ideal ion detection with a nanosecond-scale time response and a practical large sensitive area. In the parallel configuration, the bias current in one strip is diverted into other parallel strips after each detection event. Under high bias current conditions, the diverted bias current induces cascade switching of all parallel strips. Studies show that cascade switching degrades the ion count rate of SSIDs made from niobium and hence is disliked in TOF MS applications. To suppress the bias current redistribution, we connected resistors in a series with the individual parallel strips using aluminum-bonding wires. Their effect was studied by measuring the pulse height distributions.

关键词： superconducting devices time-of-flight mass spectrometry ion-surface impact

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Mesoscopic entangled coherent states implemented with a circuit quantum electrodynamics system

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Chinese Physics B 2013年第5期22卷 147-151页

作者：赵英燕姜年权 Department of Physics Wenzhou University

We show a scheme to generate entangled coherent states in a circuit quantum electrodynamics system, which con- sists of a nanomechanical resonator, a superconducting Cooper-pair box （CPB）, and a superconducting transmission line resonator. In the system, the CPB plays the role of a nonlinear medium and can be conveniently controlled by a gate volt- age including direct-current and alternating-current components. The scheme provides a powerful tool for preparing the multipartite mesoscopic entangled coherent states.

关键词： entanglement production and manipulation superconducting devices

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JOSEPHSON INTERNAL OSCILLATION-MIXING IN YBCO superconducting WEAK LINK AT LIQUID NITROGEN TEMPERATURES

JOSEPHSON INTERNAL OSCILLATION-MIXING IN YBCO SUPERCONDUCTIN...

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International Conference on Millimeter Wave and Far-Infrared Technology

作者： Song,Ji-Ming Cheng,Qi-Heng Jing,Dong Wu,Pei-Heng Yang,Sen-Zu Chen,Jian Luo,Huai-Xian Kui,Ji-Sheng Department of Information Physics University of Nanjing Department of Physics University of Nanjing

＜正＞Using a superconducting weak link（bridge） made of YBCO,we have successfully demonstrated the internal oscillation-mixing at either X or Ka band.

关键词： superconducting devices

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superconducting Magnetic Flux Transformer at 77K

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Rare Metals 1990年第1期10卷 68-68页

作者： Ren, Hongtao Xiao, Ling He, Qing Li, Jiazhang General Research Inst for Nonferrous Metals China

superconducting Quantum Interference Device (SQUID) magnetometer is a kind of magnetic flux sensor with high sensitivity, and therefore can be used in geological prospect and biomagnetic field etc.. But the SQUID magnetometer used before has to be used at the temperature of 4.2K provided by liquid helium and thus its application is limited. Since the discovery of high Tc oxide superconductors, scientists have been trying hard to put the SQUID magnetometer into use at 77K. Recently, a new kind of high Tc superconducting magnetic flux transformer winded with one piece of BiPbSrCaCuO superconducting wire is produced. The magnetic flux transformer can be designed to be insensitive to both uniform fields and fields with a constant gradient. In this letter, the fabrication and the properties of the high Tc superconducting magnetic flux transformer is described.

关键词： Ceramic Materials superconducting superconducting devices superconducting Materials Magnetic Properties

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