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dc.contributor.authorAhmed, Waqas Waseem
dc.contributor.authorHerrero, Ramon
dc.contributor.authorBotey, Muriel
dc.contributor.authorWu, Ying
dc.contributor.authorStaliunas, Kestutis
dc.date.accessioned2021-05-26T13:54:45Z
dc.date.available2021-05-26T13:54:45Z
dc.date.issued2021-05-18
dc.date.submitted2021-02-04
dc.identifier.citationAhmed, W. W., Herrero, R., Botey, M., Wu, Y., & Staliunas, K. (2021). Inverse-design of non-Hermitian potentials for on-demand asymmetric reflectivity. Optics Express, 29(11), 17001. doi:10.1364/oe.421610
dc.identifier.issn1094-4087
dc.identifier.doi10.1364/oe.421610
dc.identifier.urihttp://hdl.handle.net/10754/669270
dc.description.abstractWe 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.
dc.description.sponsorshipKing Abdullah University of Science and Technology (Artificial Intelligence Initiative Fund, BAS/1/1626-01-01, OSR-2016-CRG5-2950); European Social Fund (09.3.3-LMT-K712–17-0016); Research Council of Lithuiania (LMTLT); Spanish Ministerio de Ciencia e Innovación (PID2019-109175GB-C21).
dc.publisherThe Optical Society
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=oe-29-11-17001
dc.rightsOSA Open Access Publishing Agreement
dc.rights.urihttps://doi.org/10.1364/OA_License_v1#VOR-OA
dc.titleInverse-design of non-Hermitian potentials for on-demand asymmetric reflectivity
dc.typeArticle
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.contributor.departmentComputer, Electrical and Mathematical Science and Engineering (CEMSE) Division
dc.contributor.departmentWaves in Complex Media Research Group
dc.identifier.journalOptics Express
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartament de Física, Universitat Politècnica de Catalunya (UPC), Colom 11, E-08222 Terrassa, Barcelona, Spain.
dc.contributor.institutionInstitució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, E-08010, Barcelona, Spain.
dc.contributor.institutionVilnius University, Laser Research Center, Sauletekio al. 10, Vilnius, Lithuania.
dc.identifier.volume29
dc.identifier.issue11
dc.identifier.pages17001
kaust.personAhmed, Waqas Waseem
kaust.personWu, Ying
kaust.grant.numberBAS/1/1626-01-01
kaust.grant.numberOSR-2016-CRG5-2950)
dc.date.accepted2021-04-28
refterms.dateFOA2021-12-15T06:11:01Z
kaust.acknowledged.supportUnitOSR
kaust.acknowledged.supportUnitBAS
dc.date.published-online2021-05-18
dc.date.published-print2021-05-24


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