Higher harmonics in complex plasmas with alternating screening
Moldabekov Z.A. Aldakul Y.K. Bastykova N.K. Sundar S. Cangi A.
December 2021American Physical Society
Physical Review Research
2021#3Issue 4
We report how higher harmonics of collective excitations emerge in a two-dimensional layer of strongly correlated charged microparticles in a complex plasma with a periodically alternating screening. The simulation results of the radio frequency discharge and the charged microparticles are obtained using a highly accurate multiscale and multiphysics approach based on the particle-in-cell technique, Monte Carlo collision calculations, and molecular dynamics simulations. We also devise a simple phenomenological expression for the dispersion relation of higher harmonics. Furthermore, our analysis reveals that the periodically alternating screening causes a self-conjugate state with negative refraction. In doing so, we demonstrate how complex plasmas can serve as a test bed for studying the fundamental physics of a self-conjugate state in strongly correlated systems.
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Center for Advanced Systems Understanding (CASUS), Gorlitz, D-02826, Germany
Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, D-01328, Germany
Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Straße 10, Berlin, 13125, Germany
Al-Farabi Kazakh National University, 71 Al-Farabi street, Almaty, 050040, Kazakhstan
Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai, 600036, India
Center for Advanced Systems Understanding (CASUS)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)
Al-Farabi Kazakh National University
Department of Aerospace Engineering
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