Dissipatively coupled waveguide networks for coherent diffusive photonics

Sebabrata Mukherjee (), Dmitri Mogilevtsev (), Gregory Ya. Slepyan, Thomas H. Doherty, Robert R. Thomson and Natalia Korolkova
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Sebabrata Mukherjee: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering & Physical Sciences, Heriot-Watt University
Dmitri Mogilevtsev: Institute of Physics, Belarus National Academy of Sciences
Gregory Ya. Slepyan: School of Electrical Engineering, Faculty of Engineering, Tel Aviv University
Thomas H. Doherty: School of Physics and Astronomy, University of St Andrews, North Haugh
Robert R. Thomson: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering & Physical Sciences, Heriot-Watt University
Natalia Korolkova: School of Physics and Astronomy, University of St Andrews, North Haugh

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract A photonic circuit is generally described as a structure in which light propagates by unitary exchange and transfers reversibly between channels. In contrast, the term ‘diffusive’ is more akin to a chaotic propagation in scattering media, where light is driven out of coherence towards a thermal mixture. Based on the dynamics of open quantum systems, the combination of these two opposites can result in novel techniques for coherent light control. The crucial feature of these photonic structures is dissipative coupling between modes, via an interaction with a common reservoir. Here, we demonstrate experimentally that such systems can perform optical equalisation to smooth multimode light, or act as a distributor, guiding it into selected channels. Quantum thermodynamically, these systems can act as catalytic coherent reservoirs by performing perfect non-Landauer erasure. For lattice structures, localised stationary states can be supported in the continuum, similar to compacton-like states in conventional flat-band lattices.

Date: 2017
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DOI: 10.1038/s41467-017-02048-4

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