Genetic algorithm for desikgn of reflective filters:application to Al_xGa_1-xN based Bragg reflectors

摘要

A genetic algorithm (GA) with adaptive mutations has been employed has been employed for the design of Bragg reflectors. The algorithm enables three different design types a) composition and thickness of two layers are chosen and the pair is repeated b) two compositions are chosen for the two alternating materials, and thickness of each layer is optimized c) composition and thickness of each layer are optimized. In all cases, the wavelength and composition dependence of the index of refraction is taken into account.