Measurement of Local Reactive and Resistive Photoresponse of a Superconducting Microwave Device

Abstract

We propose and demonstrate a spatial partition method for the high-frequency photo-response of superconducting devices correlated with inductive and resistive changes in microwave impedance. Using a laser scanning microscope, we show that resistive losses are mainly produced by local defects at microstrip edges and by intergrain weak links in the high-temperature superconducting material. These defects initiate nonlinear high-frequency response due to overcritical current densities and entry of vortices.

arXiv comment4 pages, 4 figures, submitted to Applied Physics Letters

References in corpus (3)

• Laser Scanning Microscopy of HTS Films and Devices
• Effect of LaAlO${}_3$ Surface Topography on RF Current Distribution in Superconducting Microwave Devices
• Imaging Local Sources of Intermodulation in Superconducting Microwave Devices

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• Microwave Nonlinearity and Photoresponse of Superconducting Resonators with Columnar Defect Micro-Channels
• Imaging the paramagnetic nonlinear Meissner effect in nodal gap superconductor
• Dielectric Resonator Method For Determining Gap Symmetry Of Superconductors Through Anisotropic Nonlinear Meissner Effect
• Imaging collective behavior in an rf-SQUID metamaterial tuned by DC and RF magnetic fields
• Phase-resolved visualization of radio-frequency standing waves in superconducting spiral resonator for metamaterial applications
• Spatial and frequency dependencies of local photoresponse of HTS strip-line resonator in regime of two-tone microwave intermodulation excitation
• Nonlinearities in Microwave Superconductivity
• Spatial correlation of linear and nonlinear electron transport in superconducting microwave resonator: laser scanning microscopy analysis