Open AccessPolarization-independent longitudinal multi-focusing metalens
Author(s) -
Wei Wang,
Zhongyi Guo,
Keya Zhou,
Yongxuan Sun,
Fei Shen,
Yan Li,
Shiliang Qu,
Shutian Liu
Publication year - 2015
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.23.029855
Subject(s) - optics , polarization (electrochemistry) , physics , ray , longitudinal mode , physical optics , laser , chemistry
A novel multi-focusing metalens in the longitudinal direction has been proposed and investigated based on the equal optical path principle, which is independent on the incident polarizations and can be suitable for both of the linear and circular polarization incidences simultaneously. Here, three novel designing principles: partitioned mode, radial alternating mode and angular alternating mode, have been proposed firstly for constructing different types of the longitudinal multi-focusing metalenses. The performances of the designed metalenses based on the different designed methods have also been analyzed and investigated in detail, and the intensity ratio of the focusing spots can be tuned easily by modulating the numbers of the relative type of nanoantennas, which is significant for the micro-manipulating optics and the multi-imaging technology in the integrated optics.