Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Simulation results of performance characterization of the broadband achromatic metalens. (a) FWHM for the broadband achromatic metalens, where the blue dashed line represents the theoretical FWHM of the ideal Airy disk; (b) Strehl ratio for the achromatic metalens, where the blue dashed line represents the diffraction-limited criterion; (c) intensity efficiency of the broadband achromatic metalens.
