Design of a subwavelength all-metal grating for generating azimuthally polarized beams based on modified particle swarm optimization

A subwavelength metal grating for generating azimuthally polarized beams was designed. The grating material was determined by calculating the total thermal conductivity coefficient. A modified particle swarm optimization (PSO), which has a two-step algorithm structure, and a particle ...

Source: Applied Optics - May 18, 2019 Category: Physics Authors: Chunlin Zhu Qingbin Jiao Xin Tan Wei Wang Bayanheshig Source Type: research