Subterahertz chaos generation by coupling a superlattice to a linear resonator.
We investigate the effects of a linear resonator on the high-frequency dynamics of electrons in devices exhibiting negative differential conductance. We show that the resonator strongly affects both the dc and ac transport characteristics of the device, inducing quasiperiodic and high-frequency chaotic current oscillations. The theoretical findings are confirmed by experimental measurements of a GaAs/AlAs miniband semiconductor superlattice coupled to a linear microstrip resonator. Our results are applicable to other active solid state devices and provide a generic approach for developing modern chaos-based high-frequency technologies including broadband chaotic wireless communication and superfast random-number generation.
Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya 83, Saratov 410012, Russia and Saratov State Technical University, Politechnicheskaja 77, Saratov 410054, Russia.
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Hramov
Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya 83, Saratov 410012, Russia.
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Makarov
Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya 83, Saratov 410012, Russia and Saratov State Technical University, Politechnicheskaja 77, Saratov 410054, Russia.
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Koronovskii
Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya 83, Saratov 410012, Russia.
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Kurkin
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Gaifullin
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Alexeeva
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Alekseev
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
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Greenaway
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
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Fromhold
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
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Patanè
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Kusmartsev
Saratov State Technical University, Politechnicheskaja 77, Saratov 410054, Russia.
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Maksimenko
Saratov State Technical University, Politechnicheskaja 77, Saratov 410054, Russia.
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Moskalenko
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Balanov