Dual cut-off dc-tunable microwave low-pass filter on superconducting Nb microstrips with asymmetric nanogrooves

Abstract

We present a dual cut-off, dc-tunable low-pass microwave filter on a superconducting Nb microstrip with uniaxial asymmetric nanogrooves. The frequency response of the device was measured in the range $300$\,KHz to $14$\,GHz at different temperatures, magnetic fields, and dc current values. The microwave loss is most effectively reduced when the Abrikosov vortex lattice spatially matches the underlying washboard pinning landscape. The forward transmission coefficient $S_{21}(f)$ of the microstrip has a dc-tunable cut-off frequency $f_d$ which notably changes under dc bias reversal, due to the two different slope steepnesses of the pinning landscape. The device's operation principle relies upon a crossover from the weakly dissipative response of vortices at low frequencies when they are driven over the grooves, to the strongly dissipative response at high frequencies when the vortices are oscillating within one groove. The filter's cut-off frequency is the vortex depinning frequency tunable by the dc bias as it diminishes the pinning effect induced by the nanopattern. The reported results unveil an advanced microwave functionality of superconducting films with asymmetric (ratchet) pinning landscapes and are relevant for tuning the microwave loss in superconducting planar transmission lines.

References in corpus (8)

• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Reliable determination of vortex parameters from measurements of the microwave complex resistivity
• Reversible Vortex Ratchet Effects and Ordering in Superconductors with Simple Asymmetric Potential Arrays
• Microwave response of thin niobium films under perpendicular static magnetic fields
• AC-driven Vortices and the Hall Effect in a Superconductor with a Tilted Washboard Pinning Potential
• Magnetic-field dependence of count rates in superconducting thin-film TaN single-photon detectors
• Wideband microwave measurements in Nb/Pd${}_{84}$Ni${}_{16}$/Nb structures and comparison with thin Nb films
• ${}^4$He sample probe for combined microwave and dc transport measurements

Cited by in corpus (21)

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• Supersonic dynamics of guided magnetic flux quanta
• Abrikosov fluxonics in washboard nanolandscapes
• AC-driven microwave loss modulation in a fluxonic metamaterial
• Radiofrequency generation by coherently moving fluxons
• Pinning effects on self-heating and flux-flow instability in superconducting films near $T_c$
• Pinning effects on flux flow instability in epitaxial Nb thin films
• Orientational Ordering, Buckling, and Dynamic Transitions for Vortices Interacting with a Periodic Quasi-One Dimensional Substrate
• Vortex counting and velocimetry for slitted superconducting thin strips
• Reduction of microwave loss by mobile fluxons in grooved Nb films
• Time-Dependent Ginzburg-Landau Simulations of Superconducting Vortices in Three Dimensions
• Interplay of flux guiding and Hall effect in Nb films with nanogrooves
• Fast Dynamics of Vortices in Superconductors
• Analysis of the measurements of anisotropic a.c. vortex resistivity in tilted magnetic fields
• Pinning effects on hot-electron vortex flow instability in superconducting films
• Zero-bias Shapiro steps in asymmetric pinning nanolandscapes
• Directional driving of vortex lines with oscillating magnetic field
• Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids