Interaction of hot spots and THz waves in Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks of various geometry

Abstract

At high enough input power in stacks of Bi_2Sr_2CaCu_2O8 intrinsic Josephson junctions a hot spot (a region heated to above the superconducting transition temperature) coexists with regions still in the superconducting state. In the ``cold'' regions cavity resonances can occur, synchronizing the ac Josephson currents and giving rise to strong coherent THz emission. We investigate the interplay of hot spots and standing electromagnetic waves by low temperature scanning laser microscopy and THz emission measurements, using stacks of various geometries. For a rectangular and a arrow-shaped structure we show that the standing wave can be turned on and off in various regions of the stack structure, depending on the hot spot position. We also report on standing wave and hot spot formation in a disk shaped mesa structure.

References in corpus (15)

• Coherent THz emission of Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks in the hot spot regime
• Terahertz Josephson plasma waves in layered superconductors: spectrum, generation, nonlinear, and quantum phenomena
• Hot spots and waves in Bi2Sr2CaCu2O8 intrinsic Josephson junction stacks -a study by Low Temperature Scanning Laser Microscopy
• Geometrical Resonance Conditions for THz Radiation from the Intrinsic Josephson Junctions in Bi2Sr2CaCu2O8+d
• 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
• Phase dynamics of inductively coupled intrinsic Josephson junctions and terahertz electromagnetic radiation
• Mechanism of Terahertz Electromagnetic Wave Emission from Intrinsic Josephson Junctions
• Evidence for a Dual-Source Mechanism of THz Radiation from Rectangular Mesas of Single Crystalline \bm{$\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$} Intrinsic Josephson Junctions
• Radiation from a Josephson STAR-emitter
• Nonlinear nonequilibrium quasiparticle relaxation in Josephson junctions
• Quantum cascade phenomenon in natural atomic superlattices formed in Bi2Sr2CaCu2O8 single crystals
• Cavity phenomena in mesas of cuprate high-$T_c$ superconductors under voltage bias
• Stabilization of in-phase fluxon state by geometrical confinement in small Bi-2212 mesa structures
• Stationary phase-kink states and dynamical phase transitions controlled by surface impedance in THz wave emission from intrinsic Josephson junctions

Cited by in corpus (18)

• Quantitative nanoscale vortex-imaging using a cryogenic quantum magnetometer
• Broadly Tunable Sub-terahertz Emission from Internal Branches of the Current-voltage Characteristics of Superconducting Bi2Sr2CaCu2O8+d Single Crystals
• Tunable terahertz emission from Bi2Sr2CaCu2O8+δ mesa devices
• Unusual linewidth dependence of coherent THz emission measured from intrinsic Josephson junction stacks in the hot-spot regime
• Effect of vortex hotspots on the radio-frequency surface resistance of superconductors
• Hot-spot formation in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8
• Local SiC photoluminescence evidence of non-mutualistic hot spot formation and sub-THz coherent emission from a rectangular Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesa
• Direct imaging of hot spots in Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} mesa terahertz sources
• Loss mechanisms in superconducting thin film microwave resonators
• Electrical Breakdown in a V2O3 device at the Insulator to Metal Transition
• 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
• Monolithic superconducting emitter of tunable circularly polarized terahertz radiation
• 3D simulations of the electrothermal and THz emission properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks
• Variation of Longitudinal Plasma Wavelength under Irradiation and Double Resonance in Coupled Josephson Junctions
• Terahertz emission from mutually synchronized standalone Bi2Sr2CaCu2O8+x intrinsic-Josephson-junction stacks
• Comment on Counterintuitive consequence of heating in strongly driven intrinsic junctions of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesas
• Instability of flux flow and production of vortex-antivortex pairs by current-driven Josephson vortices in layered superconductors
• On-chip sensing of hotspots in superconducting terahertz emitters