Design and demonstration of a new kind of aperture for getting expected diffraction patterns

Abstract

In the regime of Fresnel diffraction, a novel algorithm is proposed for aperture design for getting expected diffraction patterns. Experiments have verified the feasibility of this method. It may be used in beam transition, optics communication, information encryption, and other related fields.

Complex Inverse Design of Meta-optics by Segmented Hierarchical Evolutionary Algorithm

“…The mutation-only evolutionary process in modified GA can force the genome to converge on the target monotonously, and it requires much less computational load. 24 However, when the search space is large, the converging time of modified GA is still relatively long and the converging ability is sometimes limited. In this work, we propose a segmented hierarchical evolutionary algorithm (SHEA) which can solve large-pixelated inverse meta-optics design problems.…”

“…Compared with GA, the modified GA is a relatively “clumsy” approach which searches for the optimized solution by changing the state of the elements of an initially generated genome one by one in a random sequence. The mutation-only evolutionary process in modified GA can force the genome to converge on the target monotonously, and it requires much less computational load . However, when the search space is large, the converging time of modified GA is still relatively long and the converging ability is sometimes limited.…”