Journal ArticleDOI
Spatial and Spatio‐Temporal Patterns in pnpn Semiconductor Devices
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In this article, spatial and spatio-temporal patterns of the current density and the potential distribution in silicon pnpn devices are expermentally investigated, and the spontaneous appearance of stationary standing, rocking, and travelling well-localized current density filaments is observed.Abstract:
Spatial and spatio-temporal patterns of the current density and the potential distribution in silicon pnpn devices are expermentally investigated. In dependence on various parameters we observe homogeneous current distributions and the spontaneous appearance of stationary standing, rocking, and travelling well-localized current density filaments. Model calculations reproduce the main features of the experiments.
In Silizium pnpn-Dioden wird das raumliche und raum-zeitliche Verhalten der Stromdichte und der Oberflachenpotentialverteilung experimentall untersucht. In Abhangigkeit von verschiedenen Systemparametern kann man raumlich homogene Stromdichtevertetiungen sowie stabile stationare, schaukelnde und wandernde lokalisierte Stromdichtefilamente beobachten. Modellrechnungen reproduzieren qualitativ die experimentellen Ergebnisse.read more
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BookDOI
Dissipative solitons in reaction diffusion systems
TL;DR: In this article, a particle approach is proposed to describe the formation of spatially extended patterns in all kinds of physical, chemical, biological and other systems, where the underlying field equations are reduced to order-parameter equations with a finite and possibly small number of degrees of freedom, without losing the important information.
Journal ArticleDOI
Regenerative memory in time-delayed neuromorphic photonic resonators
TL;DR: This proof-of-concept photonic regenerative memory might constitute a building block for a new class of neuron-inspired photonic memories that can handle high bit-rate optical signals.
Journal ArticleDOI
Pattern formation in reaction-diffusion systems—dissipative solitons in physical systems
Mathias Bode,Hans-Georg Purwins +1 more
TL;DR: In this paper, the generation of dissipative solitons and their behavior is discussed theoretically in terms of interacting fronts, and various patterns as there are stationary and moving fronts, cascades of stationary dissipative salinons and travelling, swinging and breathing solITons are the natural outcome of the theory.
Journal ArticleDOI
Noise-covered drift bifurcation of dissipative solitons in a planar gas-discharge system.
H. U. Bödeker,Michael C. Röttger,Andreas W. Liehr,Till D. Frank,Rudolf Friedrich,Hans-Georg Purwins +5 more
TL;DR: The trajectories of propagating self-organized, well-localized solitary patterns (dissipative solitons) in the form of electrical current filaments are experimentally investigated in a planar quasi-two-dimensional dc gas-discharge system with high Ohmic semiconductor barrier and the predicted drift bifurcation is found using the semiconductor resistivity as control parameter.
References
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Layer oscillations in reaction-diffusion systems
TL;DR: In this article, the authors considered a two-component system of reaction-diffusion equations involving two parameters (i.e., Varepsilon and tau) and showed that the two parameters can be expressed as
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REVIEWS OF TOPICAL PROBLEMS: Autosolitons
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Spatially resolved observation of current filament dynamics in semiconductors
TL;DR: Two-dimensional imaging of the nucleation and the dynamics of current filaments generated in homogeneous p-doped germanium at 4.2 K during impurity impact ionization induced avalanche breakdown has been performed.
Journal ArticleDOI
Self-organization in active distributed media: scenarios for the spontaneous formation and evolution of dissipative structures
TL;DR: In this article, various scenarios for self-organization in a wide range of nonequilibrium physical, chemical, and biological systems are examined, and the conditions under which turbulence arises in such systems in the absence of a flow are discussed.
Journal ArticleDOI
Pattern formation in gas discharge systems with high impedance electrodes
TL;DR: In this paper, a gas discharge is induced in a helium atmosphere using silicon electrodes and exhibits spatial structures of current filaments depending on the applied voltage, gas pressure and the geometry of the electrodes.