Results 11 to 20 of about 503,018 (197)

Luneburg lens in silicon photonics [PDF]

Optics Express, 2011
The Luneburg lens is an aberration-free lens that focuses light from all directions equally well. We fabricated and tested a Luneburg lens in silicon photonics. Our technique is sufficiently versatile for making perfect imaging devices on silicon platforms.
Di Falco, Andrea, Kehr, Susanne C., Leonhardt, Ulf   +2 more
openaire   +5 more sources

Directional Cloaking by Quadruple Luneburg Lens System

2018 20th International Conference on Transparent Optical Networks (ICTON), 2018
In this study, we propose a method based on graded-index medium in order to cloak scatterer objects. We use discretized Luneburg lenses as a graded-index medium and the proposed structure consists of four discretized Luneburg lenses, i. e., it is can be considered as a quadruple Luneburg lens system.
Aydin S. Evren, Ceren Babayigit, Emre Bor, Hamza Kurt, Mirbek Turduev   +4 more
openaire   +6 more sources

A Luneburg lens for spin waves [PDF]

Applied Physics Letters, 2018
We report on the theory of a Luneburg lens for forward-volume magnetostatic spin waves and verify its operation via micromagnetic modelling. The lens converts a plane wave to a point source, and vice versa, by a designed graded refractive index, realized by modulating either the thickness or the saturation magnetization in a circular region.
N. J. Whitehead, S. A. R. Horsley, T. G. Philbin, V. V. Kruglyak   +3 more
core   +7 more sources

Review of Luneburg Lens Antenna Designs Manufactured Using 3D Printing [PDF]

Известия высших учебных заведений России: Радиоэлектроника
Introduction. The interest in multibeam dielectric lens antenna arrays has been growing in recent years due to the development of millimeter-wave telecommunication and radar systems.
D. V. Kusaykin, I. V. Grigoriev, D. V. Denisov, P. A. Turalchuk   +3 more
doaj   +2 more sources

Metamaterial-based Luneburg Lens for RF Applications Using Additive Manufacturing

Journal of Telecommunications and Information Technology
This article takes a detailed look at modeling, simulating, calculating, and fabricating a Luneburg lens using a single material and advanced 3D printing technology.
Emma Sadoyan, Mark Mnatsakanyan, Suren Eyramjyan   +2 more
doaj   +2 more sources

Whether we win or with whom we watch: How international sporting events link to life satisfaction and work motivation. [PDF]

Br J Soc Psychol
Abstract International sporting events like the UEFA EURO 2024 provide a powerful natural context to study how social identity dynamics and social processes link to well‐being and motivation beyond the sporting domain. In this pre‐registered longitudinal experience‐sampling study (N = 842; k = 2,414 post‐game responses) across five European countries ...
Neumann M, Strauch A, Boecker L, Diel K, Escher YA, Muniak P, Oomen D, Petrowsky HM, Schwarz L, Weber M, Friese M, Genschow O, Haslam SA, Loschelder DD.   +13 more
europepmc   +2 more sources

Compact parallel‐plate waveguide half‐Luneburg geodesic lens in the Ka‐band

IET Microwaves, Antennas & Propagation, 2021
A parallel‐plate waveguide half‐Luneburg geodesic lens is designed and experimentally validated in the Ka‐band. The geodesic lens profile is modulated using spline functions to reduce its height, while the symmetry halving the lens enables reduction of ...
Nelson J.G. Fonseca, Qingbi Liao, Oscar Quevedo‐Teruel   +2 more
doaj   +1 more source

Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization

IEEE Access, 2022
This paper presents a quasi-conformal transformation optics (QCTO) based three-dimensional (3D) retroreflective flattened Luneburg lens for wide-angle millimeter-wave radio-frequency indoor localization.
Petr Kadera, Jesus Sanchez-Pastor, Hossein Eskandari, Tomas Tyc, Masoud Sakaki, Martin Schusler, Rolf Jakoby, Niels Benson, Alejandro Jimenez-Saez, Jaroslav Lacik   +9 more
doaj   +1 more source

Profile thickness synthesis of thin-film waveguide Luneburg lens

Discrete and Continuous Models and Applied Computational Science, 2022
In the work the link between the focusing inhomogeneity of the effective refractive index of waveguide Luneburg lens and the irregularity of the waveguide layer thickness generating this inhomogeneity is demonstrated.
Konstantin P. Lovetskiy, Anton L. Sevastianov, Alexander V. Zorin   +2 more
doaj   +1 more source

Gradient-Index-Based Frequency-Coded Retroreflective Lenses for mm-Wave Indoor Localization

IEEE Access, 2020
This article introduces retroreflective lenses for millimeter-wave radio-frequency indoor localization. A three-dimensional (3D) gradient-index Luneburg lens is employed to increase radar cross section (RCS) of photonic-crystal high-Q resonators and its ...
Petr Kadera, Alejandro Jimenez-Saez, Tom Burmeister, Jaroslav Lacik, Martin SchusBler, Rolf Jakoby   +5 more
doaj   +1 more source