Non-Hermitian metasurfaces for the best of plasmonics and dielectrics

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dc.citation.firstpage2326en_US
dc.citation.issueNumber7en_US
dc.citation.journalTitleOptical Materials Expressen_US
dc.citation.lastpage2334en_US
dc.citation.volumeNumber11en_US
dc.contributor.authorYang, Franken_US
dc.contributor.authorHwang, Alexanderen_US
dc.contributor.authorDoiron, Chloeen_US
dc.contributor.authorNaik, Gururaj V.en_US
dc.date.accessioned2021-07-08T13:46:04Zen_US
dc.date.available2021-07-08T13:46:04Zen_US
dc.date.issued2021en_US
dc.description.abstractMaterials and their geometry make up the tools for designing nanophotonic devices. In the past, the real part of the refractive index of materials has remained the focus for designing novel devices. The absorption, or imaginary index, was tolerated as an undesirable effect. However, a clever distribution of imaginary index of materials offers an additional degree of freedom for designing nanophotonic devices. Non-Hermitian optics provides a unique opportunity to take advantage of absorption losses in materials to enable unconventional physical effects. Typically occurring near energy degeneracies called exceptional points, these effects include enhanced sensitivity, unidirectional invisibility, and non-trivial topology. In this work, we leverage plasmonic absorption losses (or imaginary index) as a design parameter for non-Hermitian, passive parity-time symmetric metasurfaces. We show that coupled plasmonic-photonic resonator pairs, possessing a large asymmetry in absorptive losses but balanced radiative losses, exhibit an optical phase transition at an exceptional point and directional scattering. These systems enable new pathways for metasurface design using phase, symmetry, and topology as powerful tools.en_US
dc.identifier.citationYang, Frank, Hwang, Alexander, Doiron, Chloe, et al.. "Non-Hermitian metasurfaces for the best of plasmonics and dielectrics." <i>Optical Materials Express,</i> 11, no. 7 (2021) Optical Society of America: 2326-2334. https://doi.org/10.1364/OME.428469.en_US
dc.identifier.digitalome-11-7-2326en_US
dc.identifier.doihttps://doi.org/10.1364/OME.428469en_US
dc.identifier.urihttps://hdl.handle.net/1911/111003en_US
dc.language.isoengen_US
dc.publisherOptical Society of Americaen_US
dc.rightsPublished under the terms of the OSA Open Access Publishing Agreementen_US
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OAen_US
dc.titleNon-Hermitian metasurfaces for the best of plasmonics and dielectricsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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