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Metamaterials and metasurfaces
14:00 Invited talk: Forward and Inverse Design of Electromagnetic Metasurfaces
Willie John Padilla, Simiao Ren, Jordan M. Malof
Duke University (USA)
The demonstration of exotic electromagnetic metasurfaces has benefited from the advance of computational electromagnetic simulations and the continued maturation of nanolithography. Recently, deep learning has shown a unmatched ability for the forward and inverse design of electromagnetic metasurfaces. I will overview this exciting and rapidly expanding area of research, highlighting novel examples and provide an outlook.
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14:20 Invited talk: Software-defined reconfigurable metasurfaces for programmable wireless environments
online, on-demand
Maria Kafesaki, O. Tsilipakos, Ch. Liaskos
Foundation for Research and Technology Hellas (Greece)
Programmable reconfigurable metasurfaces are expected to constitute a key element in the future programmable wireless environments. Here we discuss the design and fabrication of a programmable, reconfigurable and multifunctional metasurface able to operate as all-angle perfect absorber, beam steering and beam focusing device, accounting also for all aspects imposed by the programmability incorporation.
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14:40 Invited talk: Optomechanics of ultra thin photonic metasurfaces
online, on-demand
Ognjen Ilic
University of Minnesota (USA)
We show how the ability of metasurfaces to steer and bend light can be harnessed to shape optomechanical forces. We discuss the potential of metasurfaces as ideal platforms for optomechanics because of their large-area and lightweight form. Such metasurface control of optical forces could lead to novel approaches to optical levitation and propulsion at the macro scale.
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online, live
Meraj E. Mustafa (1), Lukas Maiwald (1), Soumyadeep Saha (1), Mikhail S. Sidorenko (2), Ruslan R. Yafyasov (2), Mikhail V. Rybin (2), Manfred Eich (2), Alexander Y. Petrov (1)
(1)Hamburg University of Technology (Germany) , (2)ITMO University (Russia)
Light emission can be significantly suppressed in 3D photonic crystals at the frequency of a photonic band gap but a refractive index contrast above 1.8 is needed. We present 3D quasiperiodic structures that can significantly reduce the density of states even at lower index contrasts. The suppression of 10 dB is demonstrated in simulations with refractive index contrast of 1.4. A refractive index contrast of 1.6 is investigated experimentally in microwave regime.
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online, on-demand
Alvar Sanchez
Universitat Autonoma de Barcelona (Spain)
Here we review how cloaks for dc and low-ac magnetic fields have been theoretically proposed and experimentally demonstrated using different approaches. They range from exact cloaks for uniform dc fields to actual cloaks being used in future particle accelerators. We also present how the cloak of static and quasistatic magnetic fields by metamaterials can be realized in very simplified situations, including the case of using only a single homogeneous and isotropic material.
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15:40 Invited talk: Wideband metamaterial absorber: from concept to naval applications
online, on-demand
Xavier Begaud (1), Anne Claire Lepage (1), Michel Soiron (2), André Barka (3), Sarah Laybros (4)
(1)Télécom Paris, Institut Polytechnique de Paris (France) , (2)SART (France) , (3)ONERA-DEMR (France) , (4)NAVAL GROUP (France)
This presentation focuses on the results obtained during the two projects SAFAS and SAFASNAV, which highlight the evolution from the concept of broadband absorber with metamaterials to a realization of this concept in structural material for naval application. The French Ministry of Defense (DGA), through the National Research Agency (ANR) and the Astrid and Astrid Maturation programs, funded the research that led to these results. The simulation results were obtained using GENCI's HPC resources (Grant c2016107558).
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