期刊
OPTICS EXPRESS
卷 29, 期 11, 页码 17001-17010出版社
Optica Publishing Group
DOI: 10.1364/OE.421610
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资金
- King Abdullah University of Science and Technology (Artificial Intelligence Initiative Fund) [BAS/1/162601-01, OSR-2016-CRG5-2950]
- European Social Fund [09.3.3-LMT-K712-17-0016]
- Research Council of Lithuiania (LMTLT)
- Spanish Ministerio de Ciencia e Innovacion [PID2019-109175GB-C21]
This study proposes a genetic algorithm-assisted inverse design approach to achieve 'on-demand' light transport in planar structures, with frequency-selective and broadband asymmetric reflectivity. By controlling the permittivity distribution, controllable unidirectional light reflection can be realized, offering new possibilities for frequency-selective one-way communication in integrated photonics.
We propose a genetic algorithm-assisted inverse design approach to achieve 'ondemand' light transport in periodic and non-periodic planar structures containing dielectric and gain-loss layers. The optimization algorithm efficiently produces non-Hermitian potentials from any arbitrarily given real (or imaginary) permittivity distribution for the desired frequency selective and broadband asymmetric reflectivity. Indeed, we show that the asymmetric response is directly related to the area occupied by the obtained permittivity distribution in the complex plane. In particular, unidirectional light reflection can be designed in such a way that it switches from left to right (or vice versa) depending on the operating frequency. Moreover, such controllable unidirectional reflectivity is realized using a stack of dielectric layers while keeping the refractive index and gain-loss within realistic values. We believe this proposal will benefit the integrated photonics with frequency selective one-way communication. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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