Ultrathin and high-efficiency Pancharatnam-Berry phase metalens for millimeter waves
| dc.contributor.author | Moreno-Peñarrubia, Alexia | |
| dc.contributor.author | Teniente Vallinas, Jorge | |
| dc.contributor.author | Kuznetsov, Sergei A. | |
| dc.contributor.author | Orazbayev, Bakhtiyar | |
| dc.contributor.author | Beruete Díaz, Miguel | |
| dc.contributor.department | Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren | eu |
| dc.contributor.department | Institute of Smart Cities - ISC | en |
| dc.contributor.department | Ingeniería Eléctrica, Electrónica y de Comunicación | es_ES |
| dc.date.accessioned | 2021-06-02T14:17:04Z | |
| dc.date.available | 2021-06-02T14:17:04Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | Applying the Pancharatnam–Berry (PB) principle to half-wave plate (HWP) metasurfaces allows the manipulation of wavefronts along with the conversion of the handedness of circularly polarized incident waves by simply rotating the meta-atoms that compose the metasurface. PB metasurfaces (PBM) working in transmission mode with four or more layers have been demonstrated to reach levels of transmission effi- ciency near 100% but also have resulted in bulky structures. On the other hand, compact tri-layer ultrathin (k/8) designs have reached levels near 90% but are more challenging than single- or bi-layer structures from a manufacturing viewpoint. Here, we propose a compact ultrathin (<k/13) transmissive PBM with only two layers (which significantly simplifies the fabrication process) achieving a transmission efficiency level of around 90%, focusing the wavefront of a circularly polarized incident wave and converting its handedness. The metasurface is com- posed of identical bi-layered H-shaped unit cells (meta-atoms) whose transmission phases are chosen by introducing different rotation angles to each unit cell according to a lens spatial phase profile. The structure is analytically and numerically studied and experimentally measured, verifying an excellent behavior as an HWP PB metalens at 87 GHz. | en |
| dc.description.sponsorship | This research was funded by Spanish Ministerio de Ciencia, Innovación y Universidades, Project RTI2018-094475-B-I00 (MCIU/AEI/FEDER,UE). Sergei Kuznetsov acknowledges support from the Ministry of Science and Higher Education of the Russian Federation, Project 075-15-2020-797. | en |
| dc.format.extent | 11 p. | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.doi | 10.1063/5.0048907 | |
| dc.identifier.issn | 1077-3118 (Electronic) | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/39814 | |
| dc.language.iso | eng | en |
| dc.publisher | AIP Publishing | en |
| dc.relation.ispartof | Applied Physics Letters 118, 221105 (2021) | en |
| dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-094475-B-I00/ES/ | |
| dc.relation.publisherversion | https://doi.org/10.1063/5.0048907 | |
| dc.rights | © 2021 Author(s). | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.subject | Pancharatnam-Berry metasurfaces | en |
| dc.subject | Ultra-thin PB metalens | en |
| dc.subject | Millimeter waves | en |
| dc.title | Ultrathin and high-efficiency Pancharatnam-Berry phase metalens for millimeter waves | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/acceptedVersion | |
| dspace.entity.type | Publication | |
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