Chaos synchronization in networks of semiconductor superlattices. (25th November 2015)

• Record Type: Journal Article
• Authors: Li, Wen; Aviad, Yaara; Reidler, Igor; Song, Helun; Huang, Yuyang; Biermann, Klaus; Rosenbluh, Michael; Zhang, Yaohui; Grahn, Holger T.; Kanter, Ido
• Is Part Of: Europhysics letters. Volume 112:Number 3(2015:Nov.)
• Publication Date: 2015-11-25
• Subjects: 05.45.Xt -- 05.45.Vx -- 73.21.Cd; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/112/30007
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: Chaos synchronization has been demonstrated as a useful building block for various tasks in secure communications, including a source of all-electronic ultrafast physical random number generators based on room temperature spontaneous chaotic oscillations in a DC-biased weakly coupled GaAs/Al0.45 Ga0.55 As semiconductor superlattice (SSL). Here, we experimentally demonstrate the emergence of several types of chaos synchronization, e.g. leader-laggard, face-to-face and zero-lag synchronization in network motifs of coupled SSLs consisting of unidirectional and mutual coupling as well as self-feedback coupling. Each type of synchronization clearly reflects the symmetry of the topology of its network motif. The emergence of a chaotic SSL without external feedback and synchronization among different structured SSLs open up the possibility for advanced secure multi-user communication methods based on large networks of coupled SSLs.