• Photonics Research
  • Vol. 9, Issue 6, 1062 (2021)
Tianyue Li1, Xiaohao Xu2、4、*, Boyan Fu1, Shuming Wang1、3、5、*, Baojun Li2, Zhenlin Wang1, and Shining Zhu1、3
Author Affiliations
  • 1National Laboratory of Solid-State Microstructures, School of Physics, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China
  • 2Institute of Nanophotonics, Jinan University, Guangzhou 511443, China
  • 3Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing 210093, China
  • 4e-mail: xuxhao@jnu.edu.cn
  • 5e-mail: wangshuming@nju.edu.cn
  • show less
    DOI: 10.1364/PRJ.421121 Cite this Article Set citation alerts
    Tianyue Li, Xiaohao Xu, Boyan Fu, Shuming Wang, Baojun Li, Zhenlin Wang, Shining Zhu. Integrating the optical tweezers and spanner onto an individual single-layer metasurface[J]. Photonics Research, 2021, 9(6): 1062 Copy Citation Text show less

    Abstract

    Optical tweezers (OTs) and optical spanners (OSs) are powerful tools of optical manipulation, which are responsible for particle trapping and rotation, respectively. Conventionally, the OT and OS are built using bulky three-dimensional devices, such as microscope objectives and spatial light modulators. Recently, metasurfaces are proposed for setting up them on a microscale platform, which greatly miniaturizes the systems. However, the realization of both OT and OS with one identical metasurface is posing a challenge. Here, we offer a metasurface-based solution to integrate the OT and OS. Using the prevailing approach based on geometric and dynamic phases, we show that it is possible to construct an output field, which promises a high-numerical-aperture focal spot, accompanied with a coaxial vortex. Optical trapping and rotation are numerically demonstrated by estimating the mechanical effects on a particle probe. Moreover, we demonstrate an on-demand control of the OT-to-OS distance and the topological charge possessed by the OS. By revealing the OT–OS metasurfaces, our results may empower advanced applications in on-chip particle manipulation.
    J(x,y)=eiϕ+(x,y)|(k+)*k+|+eiϕ(x,y)|(k)*k|,

    View in Article

    |k+=|L=12[1i],|k=|R=12[1i],

    View in Article

    J(x,y)=12[eiϕ+(x,y)eiϕ(x,y)ieiϕ+(x,y)ieiϕ(x,y)][11ii]1.

    View in Article

    |ϕxϕy|=π,

    View in Article

    ϕ+(x,y)ϕ(x,y)=4θ.

    View in Article

    ϕ+(x,y,fOT)=2π(x2+y2+fOT2fOT)/λ,

    View in Article

    ϕ(x,y,fOS)=2π(x2+y2+fOS2fOS)/λ+lφ,

    View in Article

    Fej=12Re(αEkjEk*),

    View in Article

    Fej=FGraj+FRadj=14Re(α)j|E|212Im(α)Im(EkjEk*),

    View in Article

    FRadj=12Im(α)Im(EkjEk*)=12Im(α)(E0k2jΦk),

    View in Article

    F=TM·ndσ,

    View in Article

    J(x,y)=12[eiϕ+(x,y)+eiϕ(x,y)ieiϕ(x,y)eiϕ+(x,y)ieiϕ(x,y)ieiϕ+(x,y)ieiϕ+(x,y)eiϕ(x,y)].(A1)

    View in Article

    ζ1=ei{12[ϕ+(x,y)+ϕ(x,y)]},ζ2=ei{12[ϕ+(x,y)+ϕ(x,y)]π},(A2)

    View in Article

    |λ1=[cos14[ϕ+(x,y)ϕ(x,y)]sin14[ϕ+(x,y)ϕ(x,y)]],|λ2=[sin14[ϕ+(x,y)ϕ(x,y)]cos14[ϕ+(x,y)ϕ(x,y)]].(A3)

    View in Article

    J(x,y)=PΛP1=[cos14[ϕ+(x,y)ϕ(x,y)]sin14[ϕ+(x,y)ϕ(x,y)]sin14[ϕ+(x,y)ϕ(x,y)]cos14[ϕ+(x,y)ϕ(x,y)]][ei{12[ϕ+(x,y)+ϕ(x,y)]}00ei{12[ϕ+(x,y)+ϕ(x,y)]π}][cos14[ϕ+(x,y)ϕ(x,y)]sin14[ϕ+(x,y)ϕ(x,y)]sin14[ϕ+(x,y)ϕ(x,y)]cos14[ϕ+(x,y)ϕ(x,y)]].(A4)

    View in Article

    ϕx=12[ϕ+(x,y)+ϕ(x,y)],ϕy=12[ϕ+(x,y)+ϕ(x,y)π],θ=14[ϕ+(x,y)ϕ(x,y)].(A5)

    View in Article

    Tianyue Li, Xiaohao Xu, Boyan Fu, Shuming Wang, Baojun Li, Zhenlin Wang, Shining Zhu. Integrating the optical tweezers and spanner onto an individual single-layer metasurface[J]. Photonics Research, 2021, 9(6): 1062
    Download Citation