Laser Scanning Microscopy of HTS Films and Devices

Abstract

The work describes the capabilities of Laser Scanning Microscopy (LSM) as a spatially resolved method of testing high_Tc materials and devices. The earlier results obtained by the authors are briefly reviewed. Some novel applications of the LSM are illustrated, including imaging the HTS responses in rf mode, probing the superconducting properties of HTS single crystals, development of twobeam laser scanning microscopy. The existence of the phase slip lines mechanism of resistivity in HTS materials is proven by LSM imaging.

17 pages, 21 figures, Submitted to Fizika Nizkikh Temperatur (Low Temperature Physics)

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• Microscopic examination of hot spots giving rise to nonlinearity in superconducting resonators
• Determination of the Optical Index for Few-Layer Graphene by Reflectivity Spectroscopy
• Mode Structure in Superconducting Metamaterial Transmission Line Resonators
• Unconventional rf photoresponse from a superconducting spiral resonator
• Imaging the Anisotropic Nonlinear Meissner Effect in Nodal YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin-Film Superconductors
• Domain-wall and reverse-domain superconducting states of a Pb thin-film bridge on a ferromagnetic BaFe_{12}O_{19} single crystal
• Measurement of Local Reactive and Resistive Photoresponse of a Superconducting Microwave Device
• Spatial characterization of the edge barrier in wide superconducting films
• A High-Resolution Combined Scanning Laser- and Widefield Polarizing Microscope for Imaging at Temperatures from 4 K to 300 K
• Effect of LaAlO3 twin-domain topology on local dc and microwave properties of cuprate films
• Imaging of Microscopic Sources of Resistive and Reactive Nonlinearities in Superconducting Microwave Devices
• Low temperature laser scanning microscopy of a superconducting radio-frequency cavity
• Microwave Nonlinearity and Photoresponse of Superconducting Resonators with Columnar Defect Micro-Channels
• Imaging the paramagnetic nonlinear Meissner effect in nodal gap superconductor
• Imaging collective behavior in an rf-SQUID metamaterial tuned by DC and RF magnetic fields
• Phase-sensitive imaging of microwave currents in superconductive circuits
• Bulk properties of honeycomb lattices of superconducting microwave resonators
• 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
• Superconducting source and sensor of single bubbles to study nucleate boiling of liquid helium
• Spatial correlation of linear and nonlinear electron transport in superconducting microwave resonator: laser scanning microscopy analysis