Cavity mode identification for coherent terahertz emission from a nearly square stack of intrinsic Josephson junctions

2015/09/10 by Manabu Tsujimoto, Itsuhiro Kakeya, Tsujimoto, M. +7
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Semiconductor Quantum Structures and Devices #Mechanical and Optical Resonators

paper · pdf · doi:10.48550/arxiv.1509.02985

Abstract

Stacks of intrinsic Josephson junctions in Bi₂Sr₂CaCu₂O_8+δ emit intense and coherent terahertz waves determined by the internal electromagnetic cavity resonance. We identify the excited transverse magnetic mode by observing the broadly tunable emissions from an identical nearly square stack and simulating the scattering spectrum. We employ a wedge-type interferometer to measure emitted integral power independently of the far-field pattern. The simulation results are in good agreement with observed resonance behaviors as a function of frequency.

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