Design of Polarization Independent Silicon Nitride One-Dimensional Gratings Using Genetic Algorithm

摘要

Polarization independent grating can find potential application in beam steering. We have designed one-dimensional silicon nitride gratings on silica substrate by optimizing the opto-geometrical design parameters for polarization independence using genetic algorithm. For -1 diffraction order the grating shows above 94% efficiency irrespective of the polarization at 1550 nm wavelength.