@article{
author = "Isić, Goran and Zografopoulos, Dimitrios C. and Stojanović, Danka and Vasić, Borislav Z. and Belić, Milivoj R.",
year = "2021",
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. © 1995-2012 IEEE.",
publisher = "IEEE",
journal = "IEEE Journal of Selected Topics in Quantum Electronics",
title = "Beam Steering Efficiency in Resonant Reflective Metasurfaces",
volume = "27",
number = "1",
pages = "9130831",
doi = "10.1109/JSTQE.2020.3006368"
}