BRIÈRE , Gauthier

In this contribution, we use two different efficient global optimization techniques in order to optimize 3D real life gradient metasurface based on GaN semiconductor. Our results show that we can achieve more than 87% of diffrac-tion efficiency at the visible regime using only 150 solver calls for optimizing 12 parameters. Our methods seem to...

Optimization of the performance of flat optical components, also dubbed metasurfaces, is a crucial step towards their implementation in realistic optical systems. Yet, most of the design techniques, which rely on large parameter search to calculate the optical scattering response of elementary building blocks, do not account for near-field...

Metasurfaces are flat surfaces consisting of sub-wavelength nanoresonators, made of plasmonic or high dielectric refractive index materials patterned in a specific way. These flat surfaces provide nearly full control of the light properties in a very short propagation distance with high resolution [1]. By changing the dimensions, shapes, and...

A new class of quasi 2D optical components, known as metasurfaces and exhibiting exceptional optical properties have emerged in recent years. The scattering properties of their subwavelength patterns allow molding the wavefront of light in almost any desired manner. While the proof of principle is demonstrated by various approaches, only a...

The design of intrinsically flat two-dimensional optical components, i.e., metasurfaces,generally requires an extensive parameter search to target the appropriate scattering propertiesof their constituting building blocks. Such design methodologies neglect important near-fieldinteraction effects, playing an essential role in limiting the device...