Spin Unlocked Vortex Beam Generation on Nonlinear Chiroptical Metasurfaces

Wang, Mingjie1; Rong, Rong1; Chen, Jiafei1; Xu, Hongjie1; Li, Kingfai2; Li, Guixin2; Chen, Shumei1,3,4

2024-03-18

10.1021/acs.nanolett.3c04922

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Optical vortices with spin and orbital angular momentum (SAM and OAM) states offer multiple degrees of freedom for manipulating optical fields and thus enable great potentials in optical information processing. Recently, the optical metasurface has become an important platform for vortex beam generation and steering. However, the strong spin-orbit interaction on such metasurfaces usually leads to spin locked OAM generation, which limits the complete control of the angular momentum state of light. Here, we propose to solve this constraint using geometric phase controlled nonlinear chiroptical metasurfaces. The metasurface consists of two types of plasmonic meta-atoms which have opposite handedness and exhibit a strong spin-dependent circular dichroism effect. By encoding specific phase singularities and phase gradients to different channels, we experimentally demonstrate the spin unlocked second harmonic beam steering. The proposed nonlinear chiroptical metasurfaces may have important applications in developing multifunctional nonlinear optical devices.

optical chirality optical vortex second harmonicgeneration

SCI ; EI

英语

其他

National Natural Science Foundation of China["62235009","12274104"]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001187297700001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Harbin Inst Technol, Sch Integrated Circuits, Shenzhen 518055, Peoples R China
4.Harbin Inst Technol, Guangdong Prov Key Lab Semicond Optoelect Mat & In, Shenzhen 518055, Peoples R China

Wang, Mingjie,Rong, Rong,Chen, Jiafei,et al. Spin Unlocked Vortex Beam Generation on Nonlinear Chiroptical Metasurfaces[J]. NANO LETTERS,2024,24(12).

Wang, Mingjie.,Rong, Rong.,Chen, Jiafei.,Xu, Hongjie.,Li, Kingfai.,...&Chen, Shumei.(2024).Spin Unlocked Vortex Beam Generation on Nonlinear Chiroptical Metasurfaces.NANO LETTERS,24(12).

Wang, Mingjie,et al."Spin Unlocked Vortex Beam Generation on Nonlinear Chiroptical Metasurfaces".NANO LETTERS 24.12(2024).