Design of polarization-independent reflective metalens in near infrared waveband

Design of polarization-insensitive metalens with linear dispersion via improved particle swarm algorithm

“…Exploiting geometric phase combining with phase compensation, the metalens can also provide the exact phase profile required for achromatic focusing. Polarizationinsensitive metalens was also developed with nanopillar arrays [12][13][14][15] . These nanopillars usually possess centrosymmetric structure.…”