Microwave Nonlinearity and Photoresponse of Superconducting Resonators with Columnar Defect Micro-Channels

Abstract

Micro-channels of nanosized columnar tracks were planted by heavy-ion irradiation into superconducting microwave microstrip resonators that were patterned from YBa2Cu3O7-x thin films on LaAlO3 substrates. Three different ion fluences were used, producing different column densities, with each fluence having a successively greater impact on the nonlinearity of the device, as compared to a control sample. Photoresponse images made with a 638 nm rastered laser beam revealed that the channel is a location of enhanced photoresponse and a hot spot for the generation of intermodulation distortion. The microwave photoresponse technique was also advanced in this work by investigating the role of coupling strength on the distribution of photoresponse between inductive and resistive components.

10 Figures

References in corpus (7)

• Switching nonlinearity in a superconductor-enhanced metamaterial
• Superconducting Nanowires as Nonlinear Inductive Elements for Qubits
• Imaging the Anisotropic Nonlinear Meissner Effect in Nodal YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin-Film Superconductors
• Unconventional rf photoresponse from a superconducting spiral resonator
• Effect of LaAlO3 twin-domain topology on local dc and microwave properties of cuprate films
• Nonlinear Near-Field Microwave Microscope For RF Defect Localization in Superconductors
• Probing the Locally Generated Even and Odd Order Nonlinearity in Y-Ba-Cu-O and Tl-Ba-Ca-Cu-O (2212) Microwave Resonators around TC

Cited by in corpus (4)

• Dielectric Resonator Method For Determining Gap Symmetry Of Superconductors Through Anisotropic Nonlinear Meissner Effect
• Local Whole-Device Scanning of Distortion in Superconducting Microwave Resonators
• Influence of Columnar Defects on Magnetic Relaxation of Microwave Nonlinearity in Superconducting YBCO Resonator Devices
• Relaxation of Microwave Nonlinearity in a Cuprate Superconducting Resonator