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Metamaterials and metasurfaces
17:15: Mutual coupling Reduction in antenna arrays using Metasurface
Safia Jaouad (1), Mariam Aznabet (2), Otman EL Mrabet (1), Mohsine Khalladi (2)
(1)University of Abdelmalek Essaadi (Morocco) , (2)University of Wisconsin-Madison (USA)
In this paper, a meta-surface is developed as an effective solution for reducing mutual coupling between two adjacent antennas. The meta-surface comprises an array of omega shape resonators placed above two closely antennas. The simulated results show a 24 dB reduction in coupling when placing meta-surface over two adjacent antennas separated by a spacing of 1/5 wavelength at frequency of 2.85 GHz. Furthermore, the gain of antenna arrays with the meta-surface is also improved by 3dB.
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17:30 Invited talk: Manipulating Circularly Polarized Optical Radiation with Functional Metasurfaces
Fei Ding
University of Southern Denmark (Denmark)
Metasurfaces have the potential to emerge as essential components for classical and nonclassical optical fields. In this talk, I will first present two examples on how to use metasurfaces to design quarter-wave plates that can not only allow broadband circular-to-linear polarization conversion but also generate vector vortex beams or function as a versatile beam splitter. After that, I will talk about a conceptually new approach to the room-temperature generation of circularly polarized, well-collimated single photons.
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online, live
Johann Toudert (1), Rosalia Serna (2)
(1)ENSEMBLE3 Centre of Excellence (Poland) , (2)Instituto de Optica, IO-CSIC (Spain)
Bismuth shows outstanding optical properties, including a metal-like response in the ultraviolet-visible and a dielectric character with giant refractive index in the infrared. We explain how this enables bismuth-based metamaterials to show a remarkable optical response over these spectral regions. Such response can be tuned in a static way by suitable metamaterial design and in a dynamic way by harnessing the solid-liquid transition of bismuth. We discuss the application of such metamaterials to information technology, energy harvesting and sensing.
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18:10 Invited talk: Multiphysics simulations for phase change material based nanophotonics
online, on-demand
Dmitry Chigrin
RWTH Aachen University (Germany)
The growing demand on reconfigurability in neuromorphic computing, quantum computing and microwave photonics is attracting increasing attention towards design and optimization of active integrated photonic components. Phase change materials are materials in which phase transitions can be induced quickly and reversibly, resulting in pronounced changes of their physical properties. In this presentation we report on recent developments and applications of a multiphysics description of phase change material based nanophotonic systems.
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18:30 Invited talk: Dragging and amplifying light with space-time metamaterials
online, on-demand
P. A. Huidobro (1), M. G. Silveirinha (1), E. Galiffi (2), J. B. Pendry (2)
(1)University of Lisbon (Portugal) , (2)Imperial College London (United Kingdom)
In this talk I will consider space-time metamaterials of travelling-wave type and introduce the theory of homogenisation of these modulated media.
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