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 …

The modal method based on Gegenbauer polynomials (MMGE) is extended to the case of
bidimensional binary gratings. A new concept of modified polynomials is introduced in order …

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 …

The purpose of this chapter is to present a unified theory for the numerical implementation of
modal methods for the analysis of electromagnetic phenomena with specific boundary …

We present a modal method for the computation of eigenmodes of cylindrical structures with
arbitrary cross sections. These modes are found as eigenvectors of a matrix eigenvalue …

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 …

In this contribution, fundamentals of both periodic rigorous coupled wave analysis (RCWA)
technique as well as aperiodic (aRCWA) techniques will be reviewed, starting with standard …

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 …