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    Controlling wave-front shape and propagation time with tunable disordered non-Hermitian multilayers

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    Type
    Preprint
    Authors
    Novitsky, Denis
    Lyakhov, Dmitry cc
    Michels, Dominik L.
    Redka, Dmitrii
    Pavlov, Alexander
    Shalin, Alexander
    KAUST Department
    Visual Computing Center (VCC)
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Computer Science Program
    Date
    2020-10-19
    Permanent link to this record
    http://hdl.handle.net/10754/665806
    
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    Abstract
    Unique and flexible properties of non-Hermitian photonic systems attract ever-increasing attention via delivering a whole bunch of novel optical effects and allowing for efficient tuning light-matter interactions on nano- and microscales. Together with an increasing demand for the fast and spatially compact methods of light governing, this peculiar approach paves a broad avenue to novel optical applications. Here, unifying the approaches of disordered metamaterials and non-Hermitian photonics, we propose a conceptually new and simple architecture driven by disordered loss-gain multilayers and, therefore, providing a powerful tool to control both the passage time and the wave-front shape of incident light with different switching times. For the first time we show the possibility to switch on and off kink formation by changing the level of disorder in the case of adiabatically raising wave fronts. At the same time, we deliver flexible tuning of the output intensity by using the nonlinear effect of loss and gain saturation. Since the disorder strength in our system can be conveniently controlled with the power of the external pump, our approach can be considered as a basis for different active photonic devices.
    Sponsors
    The work was supported by the Belarusian Republican Foundation for Fundamental Research (Project No. F20R158), the Russian Foundation for Basic Research (Projects No. 18-02-00414 and 20-52-00031), and Government of Russian Federation (Grant No. 08-08). Numerical simulations of the nonlinear interaction of light with resonant media have been supported by the Russian Science Foundation (Project No. 18-72-10127).
    Publisher
    arXiv
    arXiv
    2010.09324
    Additional Links
    https://arxiv.org/pdf/2010.09324
    Collections
    Preprints; Computer Science Program; Visual Computing Center (VCC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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