Light shaping using scattering surfaces made of binary gratings is often used to steer light to a desired property such as a certain directionality or a spatial emission pattern. In this project we will develop a systematic approach to design an array of patches made of different periodic structures; periodicity, orientation, density, surface, shape are parameters that define each patch. Each patch scatters light in a specific manner to achieve an overall light shaping goal.
We aim to design a scattering surface that minimizes back-reflections and achieve a highly flexible desired pattern generation in the domain of interest. In doing so, we will consider optimizing the designs simulated by rigorous solvers.
Because the materials are lossless and the back-reflections are minimized compared to a diffuser, the overall efficiency will improve compared to the previously used diffusers. This would lead to some new designs for high efficiency LEDs