TY - JOUR
T1 - Polarization-controlled asymmetric excitation of surface plasmons
AU - Xu, Quan
AU - Zhang, Xueqian
AU - Yang, Quanlong
AU - Tian, Chunxiu
AU - Xu, Yuehong
AU - Zhang, Jianbing
AU - Zhao, Hongwei
AU - Li, Yanfeng
AU - Ouyang, Chunmei
AU - Tian, Zhen
AU - Gu, Jianqiang
AU - Zhang, Xixiang
AU - Han, Jiaguang
AU - Zhang, Weili
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: National Key Basic Research Program of China (2014CB339800); National Natural Science Foundation of China (NSFC) (61420106006, 61422509, 61427814, 61605143); Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) (IRT13033); National Science Foundation (NSF) (ECCS-1232081). Acknowledgment. We thank Veronic E. Tremblay for her advice on optimizing the writing.
PY - 2017/8/29
Y1 - 2017/8/29
N2 - Free-space light can be coupled into propagating surface waves at a metal–dielectric interface, known as surface plasmons (SPs). This process has traditionally faced challenges in preserving the incident polarization information and controlling the directionality of the excited SPs. The recently reported polarization-controlled asymmetric excitation of SPs in metasurfaces has attracted much attention for its promise in developing innovative plasmonic devices. However, the unit elements in these works were purposely designed in certain orthogonal polarizations, i.e., linear or circular polarizations, resulting in limited two-level polarization controllability. Here, we introduce a coupled-mode theory to overcome this limit. We demonstrated theoretically and experimentally that, by utilizing the coupling effect between a pair of split-ring-shaped slit resonators, exotic asymmetric excitation of SPs can be obtained under the x-, y-, left-handed circular, and right-handed circular polarization incidences, while the polarization information of the incident light can be preserved in the excited SPs. The versatility of the presented design scheme would offer opportunities for polarization sensing and polarization-controlled plasmonic devices.
AB - Free-space light can be coupled into propagating surface waves at a metal–dielectric interface, known as surface plasmons (SPs). This process has traditionally faced challenges in preserving the incident polarization information and controlling the directionality of the excited SPs. The recently reported polarization-controlled asymmetric excitation of SPs in metasurfaces has attracted much attention for its promise in developing innovative plasmonic devices. However, the unit elements in these works were purposely designed in certain orthogonal polarizations, i.e., linear or circular polarizations, resulting in limited two-level polarization controllability. Here, we introduce a coupled-mode theory to overcome this limit. We demonstrated theoretically and experimentally that, by utilizing the coupling effect between a pair of split-ring-shaped slit resonators, exotic asymmetric excitation of SPs can be obtained under the x-, y-, left-handed circular, and right-handed circular polarization incidences, while the polarization information of the incident light can be preserved in the excited SPs. The versatility of the presented design scheme would offer opportunities for polarization sensing and polarization-controlled plasmonic devices.
UR - http://hdl.handle.net/10754/625998
UR - https://www.osapublishing.org/optica/abstract.cfm?uri=optica-4-9-1044
UR - http://www.scopus.com/inward/record.url?scp=85029808830&partnerID=8YFLogxK
U2 - 10.1364/OPTICA.4.001044
DO - 10.1364/OPTICA.4.001044
M3 - Article
VL - 4
SP - 1044
JO - Optica
JF - Optica
SN - 2334-2536
IS - 9
ER -