In this paper, we introduce a new hybrid optimization method for the inverse design of
metasurfaces, which combines the original Harris hawks optimizer (HHO) with a gradient …

Previous works have demonstrated that a parallel plate waveguide, equipped at the end
with a tip, can be used to initiate an “electromagnetic jet (Ej)”(this name generalizes the …

In a previous paper, a modal spectral element method (SEM), the originality of which comes
from the use of a hierarchical basis built with modified Legendre polynomials, was shown to …

The polynomial modal method (PMM) is one of the most powerful methods for modeling
diffraction from lamellar gratings. In the present work, we show that applying it to the so …

High-efficiency direct numerical methods are currently in demand for optimization
procedures in the fields of both conventional diffractive and metasurface optics. With a view …

We present a topology optimization method for a 1D dielectric metasurface, based on a new
concept: fluctuation and trend analysis for initial random conditions. The key point of the …

The classical adjoint-based topology optimization (TO) method, based on the use of a
random continuous dielectric function as design variable distribution is known to be one of …

We present a topology optimization method for a 1D dielectric metasurface, coupling the
classical fluctuations-trend analysis (FTA) and diamond-square algorithm (DSA). In classical …

The classical adjoint-based topology optimization (TO) method, based on the use of a
random continuous dielectric function as an adjoint variable distribution, is known to be one …

We introduce a Domain Decomposition Spectral Method (DDSM) as a solution for Maxwell's
equations in the frequency domain. It will be illustrated in the framework of the Aperiodic …