Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity

dc.contributor.authorAhmed, Waqas Waseem
dc.contributor.authorHerrero, R.
dc.contributor.authorBotey, M.
dc.contributor.authorWu, Y.
dc.contributor.authorStaliunas, K.
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.institutionDepartament de Física, Universitat Politècnica de Catalunya (UPC), Colom 11, E-08222 Terrassa, Barcelona, Spain.
dc.contributor.institutionInstitució Catalana de Recercai Estudis Avançats (ICREA), Passeig Lluís Companys 23, E08010, Barcelona, Spain.
dc.contributor.institutionVilnius University, Laser Research Center, Saulėtekio al. 10, Vilnius, Lithuania.
dc.date.accessioned2020-09-14T08:22:31Z
dc.date.available2020-09-14T08:22:31Z
dc.date.issued2020-08-27
dc.description.abstractWe propose a general design strategy based on genetic optimization to realize asymmetric reflectivity in periodic and non-periodic planar structures containing dielectric and gain-loss layers. By means of an optimization algorithm, it is possible to design the imaginary (or real) part of the complex permittivity distribution from any given and arbitrary real (or imaginary) permittivity distribution, i.e to create non-Hermitian potentials intended to achieve on-demand light transport for a selected spectral range. Indeed, the asymmetric response of the obtained complex permittivity distribution is directly related to its area in the complex permittivity 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 can be realized using a stack of dielectric layers while keeping the refractive index and gain-loss within realistic values.
dc.eprint.versionPre-print
dc.identifier.arxivid2008.12057
dc.identifier.urihttp://hdl.handle.net/10754/665117
dc.publisherarXiv
dc.relation.urlhttps://arxiv.org/pdf/2008.12057
dc.rightsArchived with thanks to arXiv
dc.titleGenetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
dc.typePreprint
display.details.left<span><h5>Type</h5>Preprint<br><br><h5>Authors</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Ahmed, Waqas Waseem,equals">Ahmed, Waqas Waseem</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Herrero, R.,equals">Herrero, R.</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Botey, M.,equals">Botey, M.</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Wu, Y.,equals">Wu, Y.</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Staliunas, K.,equals">Staliunas, K.</a><br><br><h5>KAUST Department</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.department=Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division,equals">Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division</a><br><br><h5>Date</h5>2020-08-27</span>
display.details.right<span><h5>Abstract</h5>We propose a general design strategy based on genetic optimization to realize asymmetric reflectivity in periodic and non-periodic planar structures containing dielectric and gain-loss layers. By means of an optimization algorithm, it is possible to design the imaginary (or real) part of the complex permittivity distribution from any given and arbitrary real (or imaginary) permittivity distribution, i.e to create non-Hermitian potentials intended to achieve on-demand light transport for a selected spectral range. Indeed, the asymmetric response of the obtained complex permittivity distribution is directly related to its area in the complex permittivity 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 can be realized using a stack of dielectric layers while keeping the refractive index and gain-loss within realistic values.<br><br><h5>Publisher</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.publisher=arXiv,equals">arXiv</a><br><br><h5>arXiv</h5><a href="https://arxiv.org/abs/2008.12057">2008.12057</a><br><br><h5>Additional Links</h5>https://arxiv.org/pdf/2008.12057</span>
kaust.personAhmed, Waqas Waseem
kaust.personWu, Y.
refterms.dateFOA2020-09-14T08:27:06Z
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