Lumped element kinetic inductance detectors based on two-gap MgB2 thin films

Yang, Can; Niu, Ruirui; Guo, Zhengshan; Cai, Xiong; Chu, Hui; Yang, Kai; Wang, Yinxi; Feng, Qian; Gan, Zizhao

doi:10.1063/1.5013286

Cited by 13 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[64] Lumped element kinetic inductance detectors (LEKIDs) [65] were made from MgB 2 superconducting films to sensitively detect terahertz waves with a much higher T c . [66] In this study, the MgB 2 superconducting film with c-axis orientation and a thickness of 0.5 mm was prepared on MgO (111) substrate with a dimension of 10mm × 10mm × 0.3 mm by hybrid physical-chemical vapor deposition (HPCVD). [67] The relative permittivity of the MgO substrate was 9.6.…”

Section: Lssp Skyrmions Based On Mgb 2 Superconducting Filmmentioning

confidence: 99%

Localized Spoof Surface Plasmon Skyrmions Excited by Guided Waves

Yin

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Recently, skyrmions are constructed in the system of localized spoof surface plasmons (LSSPs), showing topological robustness and near‐equidistant multi‐resonant response. Guided wave excitation of the LSSP skyrmions plays an elementary role in large‐scale planar integration and construction of complex networks. However, it is not investigated. In this study, the LSSP skyrmions are excited by guided waves supported by two kinds of widely used transmission lines, microstrip line and coplanar waveguide. Space‐coiling meta‐structures with different shapes that support LSSP skyrmions are etched on the ground planes as defected ground structures (DGSs). All structures including resonator, transmission line, input and output ports are in one plane. The structures are fabricated on printed circuit boards (PCBs) and the near‐equidistant multi‐resonant spectra of the LSSP skyrmions are measured. Moreover, to reduce the material loss, the structure is made on MgB2 superconducting film, and the quality factor (Q‐factor) is increased by seven times compared to the corresponding mode on PCB. This study paves the way for the massive planar integration of the LSSP skyrmions and the construction of complex networks with the LSSP skyrmions, and provides an idea for developing metasurfaces with low material loss in the microwave and terahertz bands.

show abstract

Section: Lssp Skyrmions Based On Mgb 2 Superconducting Filmmentioning

confidence: 99%

Localized Spoof Surface Plasmon Skyrmions Excited by Guided Waves

Yin

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The MgB 2 thin films were prepared by hybrid physical-chemical vapor deposition (HPCVD) developed by Xi et al [32]. Details of the HPCVD system used in this work can be found in references [33,34]. Briefly, Mg ingots (>99.5% purity) were placed around a 5 × 5 × 0.3 mm MgO (111) substrate on a molybdenum susceptor, and heated up to 660 • C in 4 kPa ultrahigh pure hydrogen (>99.9999% purity).…”

Section: Sample Preparation and Moi Technologymentioning

confidence: 99%

Tunable domino effect of thermomagnetic instabilities in superconducting films with multiply-connected topological structures

et al. 2022

View full text Add to dashboard Cite

Topology is a crucial ingredient for understanding the physical properties of superconductors. Magnetic field crowds to adopt the form of a topologically-protected quantum flux lines which can lose this property when moving at high velocities. These extreme conditions can be realized when superconductors undergo a thermomagnetic instability for which the sample topology come also into play. In this work, utilizing the magneto-optical imaging technique, we experimentally study magnetic flux avalanches in superconducting films with multiply-connected geometries, including single and double rings. We observe a domino effect in which avalanches triggered at the outer ring, stimulate avalanches at the inner ring thus impairing the expected magnetic shielding resulting from the outer ring and gap. We implement numerical simulations in order to gain more insight into the underlying physical mechanism and demonstrate that such event is not caused by the heat conduction, but mainly attributed to the local current distribution variation near the preceding flux avalanche in the outer ring, which in turn has a ripple effect on the local magnetic field profile in the gap. Furthermore, we find that the domino effect of thermomagnetic instabilities can be switched on/off by the environmental temperature and the gap width between the concentric rings. These findings provide new insights on the thermomagnetic instability in superconducting devices with complex topological structures, such as the superconductor-insulator-superconductor (SIS) multilayer structures of superconducting radio-frequency (SRF) cavities.

show abstract

“…pH/□ and two energy gaps ∆σ and ∆π. This material has been successfully used to demonstrate operation of KIDs [79] and SNSPDs [80] at higher temperatures.…”

Section: Materials For Superconducting Photon Detectors: a Brief Intr...mentioning

confidence: 99%

Superconducting photon detectors

Morozov

Casaburi

Hadfield

2021

Contemporary Physics

View full text Add to dashboard Cite

The ability to detect individual light quanta -single photons -is prized across many fields of physics from astronomy to quantum optics. Superconducting photon detectors offer exceptional performance in terms of sensitivity, spectral range and timing resolution. In this review we introduce the underlying physics of photon absorption in superconducting devices. We then present detailed case studies of contemporary superconducting detector technologies for photon counting at visible and infrared wavelengths. We conclude with a perspective on future developments in this exciting area.

show abstract

Lumped element kinetic inductance detectors based on two-gap MgB2 thin films

Cited by 13 publications

References 24 publications

Localized Spoof Surface Plasmon Skyrmions Excited by Guided Waves

Localized Spoof Surface Plasmon Skyrmions Excited by Guided Waves

Tunable domino effect of thermomagnetic instabilities in superconducting films with multiply-connected topological structures

Superconducting photon detectors

Contact Info

Product

Resources

About