Bridging the terahertz gap for chaotic sources with superconducting junctions
journal contributionposted on 15.02.2019 by D Gulevich, V.P. Koshelets, Feodor Kusmartsev
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We observe a broadband chaotic signal of terahertz frequency emitted from a superconducting junction. The generated radiation has a wide spectrum reaching 0.7 THz and power sufficient to drive on-chip circuit elements. Our experimental finding is fully confirmed by numerical modeling based on microscopic theory and reveals the unrealized potential of superconducting systems in chaos-based terahertz communication, fast generation of true random numbers, and noninvasive terahertz spectroscopy.
The theoretical part of the work and numerical modeling are supported by the Russian Science Foundation under Grant No. 18-12-00429. The experimental study is supported from Grant No. 17-52-12051 of the Russian Foundation for Basic Research.