Chaos synchronization in networks of semiconductor superlattices

Wen Li, Yaara Aviad, Igor Reidler, Helun Song, Yuyang Huang, Klaus Biermann, Michael Rosenbluh, Yaohui Zhang, Holger T. Grahn, Ido Kanter

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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/Al0.45Ga0.55As 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.

Original languageEnglish
Article number30007
Issue number3
StatePublished - 1 Nov 2015

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© 2015 EPLA.


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