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@article{2244940,
author = {Chen, Qiao and Horsley, Simon A. R. and Fonseca, Nelson J. G. and Tyc, Tomáš and QuevedoandTeruel, Oscar},
article_location = {London},
article_number = {1},
doi = {http://dx.doi.org/10.1038/s41467-022-29587-9},
keywords = {lenses; microwave photonics; transformation optics},
language = {eng},
issn = {2041-1723},
journal = {Nature Communications},
title = {Double-layer geodesic and gradient-index lenses},
url = {https://www.nature.com/articles/s41467-022-29587-9},
volume = {13},
year = {2022}
}
TY - JOUR
ID - 2244940
AU - Chen, Qiao - Horsley, Simon A. R. - Fonseca, Nelson J. G. - Tyc, Tomáš - Quevedo-Teruel, Oscar
PY - 2022
TI - Double-layer geodesic and gradient-index lenses
JF - Nature Communications
VL - 13
IS - 1
SP - 1-12
EP - 1-12
PB - Nature Publishing Group
SN - 20411723
KW - lenses
KW - microwave photonics
KW - transformation optics
UR - https://www.nature.com/articles/s41467-022-29587-9
N2 - A double-layer lens consists of a first gradient-index/geodesic profile in an upper waveguide, partially surrounded by a mirror that reflects the wave into a lower guide where there is a second profile. Here, we derive a new family of rotational-symmetric inhomogeneous index profiles and equivalent geodesic lens shapes by solving an inverse problem of pre-specified focal points. We find an equivalence where single-layer lenses have a different functionality as double-layer lenses with the same profiles. As an example, we propose, manufacture, and experimentally validate a practical implementation of a geodesic double-layer lens that is engineered for a low-profile antenna with a compact footprint in the millimeter wave band. Its unique double-layer configuration allows for two-dimensional beam scanning using the same footprint as an extension of the presented design. These lenses may find applications in future wireless communication systems and sensing instruments in microwave, sub-terahertz, and optical domains.
ER -
CHEN, Qiao, Simon A. R. HORSLEY, Nelson J. G. FONSECA, Tomáš TYC a Oscar QUEVEDO-TERUEL. Double-layer geodesic and gradient-index lenses. \textit{Nature Communications}. London: Nature Publishing Group, 2022, roč.~13, č.~1, s.~1-12. ISSN~2041-1723. Dostupné z: https://dx.doi.org/10.1038/s41467-022-29587-9.
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