Hot spots and waves in Bi2Sr2CaCu2O8 intrinsic Josephson junction stacks -a study by Low Temperature Scanning Laser Microscopy

Abstract

Recently, it has been shown that large stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8 emit synchronous THz radiation, the synchronization presumably triggered by a cavity resonance. To investigate this effect we use Low Temperature Scanning Laser Microscopy to image electric field distributions. Apart from verifying the appearance of cavity modes at low bias we find that, in a high input power regime, standing-wave patterns are created through interactions with a hot spot, possibly pointing to a new mode of generating synchronized radiation in intrinsic Josephson junction stacks.

6 pages, 5 figures, supplementary information included

References in corpus (4)

• Possible Dynamic States in Inductively Coupled Intrinsic Josephson Junctions of Layered High-$T_c$ Superconductors
• Resonant electromagnetic emission from intrinsic Josephson-junction stacks with laterally modulated Josephson critical current
• Quantum cascade phenomenon in natural atomic superlattices formed in Bi2Sr2CaCu2O8 single crystals
• Imaging of Thermal Domains in ultrathin NbN films for Hot Electron Bolometers

Cited by in corpus (18)

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• Cavity mode waves during terahertz radiation from rectangular Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesas
• Thermal and electromagnetic properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks studied via one-dimensional coupled sine-Gordon equations
• Cavity phenomena in mesas of cuprate high-$T_c$ superconductors under voltage bias
• In-plane dissipation as a possible synchronization mechanism for terahertz radiation from intrinsic Josephson junctions of layered superconductors
• Monolithic superconducting emitter of tunable circularly polarized terahertz radiation
• Domain-wall and reverse-domain superconducting states of a Pb thin-film bridge on a ferromagnetic BaFe_{12}O_{19} single crystal
• A High-Resolution Combined Scanning Laser- and Widefield Polarizing Microscope for Imaging at Temperatures from 4 K to 300 K
• Direct visualization of phase-locking of large Josephson junction arrays by surface electromagnetic waves
• Control of Circularly Polarized THz Wave from Intrinsic Josephson Junctions by Local Heating
• Variation of Longitudinal Plasma Wavelength under Irradiation and Double Resonance in Coupled Josephson Junctions
• "Quick and dirty" technology for fabrication of a single BiSrCaCuO mesas
• Wave functions for high-symmetry, thin microstrip antennas and two-dimensional quantum boxes
• Terahertz emission from mutually synchronized standalone Bi2Sr2CaCu2O8+x intrinsic-Josephson-junction stacks
• A distributed, active patch antenna model of a Josephson oscillator
• Increasing THz Radiation Power and Monochromaticity Using Optically Induced Photonic Crystal in Layered Superconductors