Coherent emission from disordered arrays of driven Josephson vortices
Fabio Marchesoni, Sergey Savel'ev, Masashi Tachiki, Franco Nori
TL;DR
This paper introduces a mechanism for coherent THz emission from disordered arrays of driven Josephson vortices, differing from super-radiance, with analytical and simulation agreement on emission characteristics.
Contribution
It predicts resonant radiation from weakly correlated vortex arrays, expanding understanding beyond highly ordered vortex lattice emission mechanisms.
Findings
Analytical results match recent simulations.
Resonant radiation occurs in disordered vortex arrays.
Emission power depends on dissipation.
Abstract
We propose a mechanism of coherent emission from driven vortices in stacked intrinsic Josephson junctions. In contrast to super-radiance, which occurs only for highly ordered vortex lattices, we predict resonant radiation emission from weakly correlated vortex arrays. Our analytical results for the THz wave intensity, resonance frequencies, and the dependence of THz emission power on dissipation are in good agreement with the ones obtained by recent simulations.
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