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

Abstract

The THz radiation emitted from rectangular mesas of single-crystal $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$ was studied using angular distribution measurements and Fourier transform infrared spectroscopy. Unlike the recent theoretical predictions, the results provide strong evidence for a dual-source mechanism in which the uniform and non-uniform parts of the $ac$-Josephson current act as electric and magnetic current sources, respectively. The latter synchronizes with cavity modes of the mesa with integral harmonics of the fundamental radiation.

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Cited by in corpus (20)

• Coherent THz emission of Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks in the hot spot regime
• Geometrical Resonance Conditions for THz Radiation from the Intrinsic Josephson Junctions in Bi2Sr2CaCu2O8+d
• Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays
• 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
• Interaction of hot spots and THz waves in Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks of various geometry
• Radiation from a Josephson STAR-emitter
• Hot-spot formation in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8
• Stability of dynamic coherent states in intrinsic Josephson-junction stacks near internal cavity resonance
• Intense terahertz emission from intrinsic Josephson junctions by external heat control
• 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 mode waves during terahertz radiation from rectangular Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesas
• Cavity mode identification for coherent terahertz emission from a nearly square stack of intrinsic Josephson junctions
• Observation of superluminal geometrical resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
• Mutually synchronized macroscopic Josephson oscillations demonstrated by polarization analysis of superconducting terahertz emitters
• Control of Circularly Polarized THz Wave from Intrinsic Josephson Junctions by Local Heating
• Emission of Circularly Polarized Terahertz Wave from Inhomogeneous Intrinsic Josephson Junctions
• Terahertz emission from mutually synchronized standalone Bi2Sr2CaCu2O8+x intrinsic-Josephson-junction stacks
• Wave functions for high-symmetry, thin microstrip antennas and two-dimensional quantum boxes
• Possibility to enhance teraherz emission from intrinsic Josephson junction by external local heating