Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity

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...

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Autores: Ahmed Waseem, Waqas Waseem, Herrero Simon, Ramon|||0000-0001-5572-1540, Botey Cumella, Muriel|||0000-0001-8984-4899, Wu, Ying, Staliunas, Kestutis|||0000-0002-0539-9538
Tipo de recurso: informe técnico
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/345572
Acceso en línea:https://hdl.handle.net/2117/345572
Access Level:acceso abierto
Palabra clave:Light--Transmission
Reflection (Optics)
Llum -- Transmissió
Reflexió (Òptica)
Àrees temàtiques de la UPC::Física
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spelling Genetic optimization Invents non-Hermitian potentials for Asymmetric ReflectivityAhmed Waseem, Waqas WaseemHerrero Simon, Ramon|||0000-0001-5572-1540Botey Cumella, Muriel|||0000-0001-8984-4899Wu, YingStaliunas, Kestutis|||0000-0002-0539-9538Light--TransmissionReflection (Optics)Llum -- TransmissióReflexió (Òptica)Àrees temàtiques de la UPC::FísicaWe 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.The work described in here is partially supported by King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2016- CRG5-2950, KAUST Baseline Research Fund BAS/1/1626-01-01 and by NATO SPS research grant No: 985048. K.S. acknowledges funding from European Social Fund (project No 09.3.3- LMT-K712-17- 0016) under grant agreement with the Research Council of Lithuania (LMTLT).20202020-08-0120212021-05-13reporthttp://purl.org/coar/resource_type/c_93fcAOhttp://purl.org/coar/version/c_b1a7d7d4d402bcceinfo:eu-repo/semantics/reportapplication/pdfhttps://hdl.handle.net/2117/345572reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3455722026-05-27T15:37:01Z
dc.title.none.fl_str_mv Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
title Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
spellingShingle Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
Ahmed Waseem, Waqas Waseem
Light--Transmission
Reflection (Optics)
Llum -- Transmissió
Reflexió (Òptica)
Àrees temàtiques de la UPC::Física
title_short Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
title_full Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
title_fullStr Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
title_full_unstemmed Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
title_sort Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
dc.creator.none.fl_str_mv Ahmed Waseem, Waqas Waseem
Herrero Simon, Ramon|||0000-0001-5572-1540
Botey Cumella, Muriel|||0000-0001-8984-4899
Wu, Ying
Staliunas, Kestutis|||0000-0002-0539-9538
author Ahmed Waseem, Waqas Waseem
author_facet Ahmed Waseem, Waqas Waseem
Herrero Simon, Ramon|||0000-0001-5572-1540
Botey Cumella, Muriel|||0000-0001-8984-4899
Wu, Ying
Staliunas, Kestutis|||0000-0002-0539-9538
author_role author
author2 Herrero Simon, Ramon|||0000-0001-5572-1540
Botey Cumella, Muriel|||0000-0001-8984-4899
Wu, Ying
Staliunas, Kestutis|||0000-0002-0539-9538
author2_role author
author
author
author
dc.subject.none.fl_str_mv Light--Transmission
Reflection (Optics)
Llum -- Transmissió
Reflexió (Òptica)
Àrees temàtiques de la UPC::Física
topic Light--Transmission
Reflection (Optics)
Llum -- Transmissió
Reflexió (Òptica)
Àrees temàtiques de la UPC::Física
description 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.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-08-01
2021
2021-05-13
dc.type.none.fl_str_mv report
http://purl.org/coar/resource_type/c_93fc
AO
http://purl.org/coar/version/c_b1a7d7d4d402bcce
dc.type.openaire.fl_str_mv info:eu-repo/semantics/report
format report
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/345572
url https://hdl.handle.net/2117/345572
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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