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- W3038900613 abstract "Beam steering is one of the prevailing functions performed by electromagnetic metasurfaces. Its efficiency depends on a large number of physical parameters associated with resonant elements comprising the metasurface and is thus notoriously difficult to optimize. Here we formulate a theoretical model for evaluating the diffraction efficiency of an array of lossy resonant elements whose spectral response is dominated by the coupling between a leaky eigenmode and a single incoming/outgoing channel. We use it to deduce a formula for the maximum attainable diffraction efficiency and the gradient parameter profile for which it is achieved. The optimization procedure is demonstrated on the example of an electrically tunable liquid-crystal terahertz beam steering metasurface. Finally, the proposed model is benchmarked against rigorous metasurface simulations." @default.
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- W3038900613 date "2021-01-01" @default.
- W3038900613 modified "2023-10-16" @default.
- W3038900613 title "Beam Steering Efficiency in Resonant Reflective Metasurfaces" @default.
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- W3038900613 doi "https://doi.org/10.1109/jstqe.2020.3006368" @default.
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