Metal-free design of a multilayered metamaterial with chirped Bragg grating for enhanced radiative cooling

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dc.contributor.authorOsuna Ruiz, David
dc.contributor.authorLezaun Capdevila, Carlos
dc.contributor.authorTorres García, Alicia E.
dc.contributor.authorBeruete Díaz, Miguel
dc.contributor.departmentIngeniería Eléctrica, Electrónica y de Comunicaciónes_ES
dc.contributor.departmentInstitute of Smart Cities - ISCen
dc.contributor.departmentIngeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzareneu
dc.date.accessioned2023-10-24T13:36:43Z
dc.date.available2023-10-24T13:36:43Z
dc.date.issued2023
dc.date.updated2023-10-24T13:10:19Z
dc.description.abstractA wideband, all-dielectric metamaterial structure for enhancing radiative cooling is investigated. The structure is optimized to reflect most of the solar irradiance window (between 0.3 µm–3 µm), which is one of the biggest challenges in highly efficient radiative cooling coatings. The design is based on the principles of Bragg gratings, which constitutes a simple synthesis procedure to make a broadband reflector of reduced dimensions, without metallic layers, while keeping a flat enough response in the entire bandwidth. Numerical results show that reflection of solar irradiation can be easily tailored and maximized using this method, as well as the net cooling power of the device, about ∼79 W/m2 at daytime (about double at night-time) and a temperature reduction of 23 K (assuming no heat exchange) and 7 K assuming a heat exchange coefficient of 10 W/m2/K, for a device and ambient temperatures of 300 K and 303 K, respectively. This occurs even in detriment of absorption in the atmospheric window (8 µm–13 µm). Results also show the importance of efficiently reflecting solar irradiance for such technologies and its relevance in synthesis and design without using metallic components.en
dc.description.sponsorshipEuropean Commission (Next Generation, PRTR, TED2021-132074B-C33); Ministerio de Ciencia e Innovación (TED2021-132074B-C33); Gobierno de Navarra (PC048-049-DisenIA).en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRuiz, D. O., Lezaun, C., Torres-García, A. E., Beruete, M. (2023) Metal-free design of a multilayered metamaterial with chirped Bragg grating for enhanced radiative cooling. Optics Express, 31(14), 22698-22709. https://doi.org/10.1364/OE.492404.en
dc.identifier.doi10.1364/OE.492404
dc.identifier.issn1094-4087
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/46630
dc.language.isoengen
dc.publisherOpticaen
dc.relation.ispartofOptics Express, 31(14), 2023en
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI//TED2021-132074B-C33/
dc.relation.projectIDinfo:eu-repo/grantAgreement/Gobierno de Navarra//PC048-049-DisenIA/
dc.relation.publisherversionhttps://doi.org/10.1364/OE.492404
dc.rights© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreementen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectRadiative coolingen
dc.titleMetal-free design of a multilayered metamaterial with chirped Bragg grating for enhanced radiative coolingen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
relation.isAuthorOfPublicatione2bd31df-fda6-4baf-a98d-cf52d52a0764
relation.isAuthorOfPublicationca4aa184-deea-4491-89b0-13970303e648
relation.isAuthorOfPublication80799664-73cc-48f8-a0de-e2f8131324ab
relation.isAuthorOfPublication6853cbd8-0a88-42ab-b165-c51b99cb6353
relation.isAuthorOfPublication.latestForDiscovery80799664-73cc-48f8-a0de-e2f8131324ab

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