Open AccessTransmissive mid-infrared achromatic bifocal metalens with polarization sensitivity
Author(s) -
Xueshen Li,
Shouqian Chen,
Di Wang,
Xiaotian Shi,
Zhigang Fan
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.424887
Subject(s) - achromatic lens , optics , holography , polarization (electrochemistry) , infrared , chromatic aberration , chromatic scale , materials science , diffraction efficiency , physics , optoelectronics , chemistry
Metasurfaces have shown great potential in versatile areas such as vortex-beam generators, metalenses, holograms and so on. However, chromatic error hinders metasurfaces, especially metalenses, from wider applications. In this paper, we demonstrate a novel design for a transmissive mid-infrared achromatic bifocal metalens with polarization sensitivity. The compensation phase is used to eliminate the chromatic aberration. Simulation results show that, over a continuous waveband from 3.9 to 4.6µm, the focal length only changes by 2.26% with an average focusing efficiency of about 18%. This work can push the practical application of mid-infrared metasurfaces.