基于Thue-Morse透镜的轴向多涡旋光束

Axial Multi-Vortex Beam Based on Thue-Morse Lens

基于Thue-Morse非周期数学序列设计了一种新型衍射光子学元件——Thue-Morse多焦点涡旋透镜。与菲涅耳涡旋透镜相比,该类型透镜沿轴向具有多个聚焦涡旋且对称位置处的聚焦涡旋具有同等强度。理论与实验证明,Thue-Morse涡旋透镜具有独特的光学性质。该类型透镜可以产生涡旋光束阵列,实现多平面金属微粒、低折射率介质微粒等的束缚,在微纳光学领域具有潜在的应用价值。

Based on the Thue-Morse aperiodic mathematical sequence, a new kind of diffractive optical elements （DOEs）, which is Thue-Morse multi-focal vortex lens, is proposed. Compared with the Fresnel vortex lens, the generated beam by the Thue-Morse vortex lens possesses the optical vortices embedded at the axial loci and the symmetry optical vortices have the equal intensity. The simulations and experiments verify the unique diffraction properties of the Thue-Morse vortex lens, which can generate vortices array and realize the trappings of metal particles and dielectric particles of low refractive index. The Thue-Morse vortex lens can be potentially applied in the research fields of micro and nanophotonics.