Synchronization of chaotic network quantum dot light-emitting diodes under optical feedback
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RESEARCH ARTICLE
Synchronization of chaotic network quantum dot light-emitting diodes under optical feedback Huda M. Ali1 • Hussein B. Al Husseini1
Received: 8 June 2020 / Accepted: 19 September 2020 Ó The Optical Society of India 2020
Abstract Chaos synchronization of delayed quantum dot light-emitting diodes has been studied theoretically, which are coupled via open and closed-loop networks. Dynamics are identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time, the system exhibits complete synchronization. Under proper conditions, the quantum dot light-emitting diodes can be satisfactorily synchronized under the optical feedback effect of diodes. Keywords Quantum dot light-emitting diodes Network Chaos synchronization
Introduction Networks of quantum dot light-emitting diodes (QD-LED) coupled dynamical systems show that chaotic behavior is a subject of major interest in an assortment of fields ranging from biology [1, 2], semiconductor lasers [3, 4] to electronic circuits [5, 6], such as secure communication and neuroscience. In the QD-LED system studying, the control of complex dynamics has evolved over the past years as one of the major problems in nonlinear applied sciences by controlling the chaotic movement converted to a single, regular signal, and it is predictable [7–9]. Another possibility of applications of chaotic semiconductor QD-LEDs & Hussein B. Al Husseini [email protected]; [email protected] Huda M. Ali [email protected] 1
Department of Physics, College of Science, University of Thi-Qar, Nasiriyah, Iraq
is chaotic secure communication in the network. The key to chaotic communication is chaos synchronization between two nonlinear systems. If two nonlinear chaotic systems operate dependently, the two systems show the same output because of the sensitivity of chaos for the initial conditions. However, when a small portion of a chaotic output from one nonlinear system is sent to the other, the two systems synchronize with each other and show the same output under certain conditions of the system parameters. This scheme is called chaos synchronization. It is very surprising that two chaotic systems share the same waveform since chaos is sensitive to the initial conditions and its future is unpredictable [10]. In this work, we overview chaos synchronization in the chaotic semiconductor of network systems for the introduction of secure chaos communication. We will discuss the chaotic synchronization of complex sequences of eight systems chaotic oscillations in QD-LED with optical feedback. They are integrated as one of, where look for a transition between non-synchronization and synchronization is mainly studied in chaotic states where chaotic evolution in the nonlinear systems under study can be controlled. This paper is organized as follows: We have achieved perfect synchronization in randomized systems, which introduce the model equations and the optical feedback scheme in Sect. 2. Section 3 is devoted to network
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