THz emission from intrinsic Josephson junctions at zero magnetic field via breather auto-oscillations

Abstract

I propose a new mechanism of intense high-frequency electromagnetic wave generation by spatially uniform stacked Josephson junctions at zero magnetic field. The ac-Josephson effect converts the dc-bias voltage into ac-supercurrent, however, in the absence of spatial variation of Josephson phase difference, does not provide dc-to-ac power conversion, needed for emission of electromagnetic waves. Here I demonstrate that at geometrical resonance conditions, the spatial homogeneity of phase can be spontaneously broken by appearance of breathers (bound fluxon-antifluxon pairs), facilitating effective dc-to-ac power conversion. The proposed mechanism explains all major features of recently observed THz radiation from large area Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ mesa structures.

4 pages, 3 figures

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Cited by in corpus (14)

• 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 thermal inhomogeneity for THz radiation from intrinsic Josephson junction stacks of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Hot-spot formation in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8
• 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
• 3D simulations of the electrothermal and THz emission properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks
• Direct visualization of phase-locking of large Josephson junction arrays by surface electromagnetic waves
• Temperature dependence of geometrical and velocity matching resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
• Manifestation of Resonance-Related Chaos in Coupled Josephson Junctions
• ac-locking of thermally-induced sine-Gordon breathers
• Heat-transfer fingerprint of Josephson breathers
• Radiative annihilation of a soliton and an antisoliton in the coupled sine-Gordon equation
• Effects of correlated noise on the excitation of robust breathers in an ac-driven, lossy sine-Gordon system
• Strong polaritonic interaction between flux-flow and phonon resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions: Angular dependence and the alignment procedure