Open AccessBroadband and high-efficiency spin-polarized wave engineering with PB metasurfaces
Author(s) -
Shiqing Li,
Shaohua Dong,
Sixiong Yi,
Wenfeng Pan,
Yizhen Chen,
Fuxin Guan,
Haitao Guo,
Zhuo Wang,
Qiong He,
Lei Zhou,
Shulin Sun
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.394658
Subject(s) - broadband , photonics , bandwidth (computing) , optics , optoelectronics , physics , photonic crystal , computer science , telecommunications
Manipulating circularly polarized (CP) light waves at will are highly important for photonic researches and applications. Recently, while Pancharatnam-Berry (PB) metasurfaces have shown unprecedented capabilities to control CP light, meta-devices constructed so far always suffer from the limitations of low-efficiency and narrow bandwidth. Here, we propose a scheme to construct PB metasurfaces with these two issues well addressed. To verify our idea, two PB meta-devices are designed and fabricated for achieving high-efficiency and broadband photonic spin Hall effect and focusing effect, respectively. Experimental results, in good agreement with full wave simulations, demonstrate the desired functionalities with efficiencies reaching 80% within an ultra-wide frequency band (8.2-17.3GHz). The proposed design scheme is generic and can be extended to high-frequency regimes. Our work can stimulate the realizations of high-performance and broadband PB meta-devices with diversified functionalities.