Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material
Original Articles|Updated:2024-09-19
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Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material
Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material
LSA2017年6卷第3期
Affiliations:
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230027, China
Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material[J]. LSA, 2017,6(3).
Ni, J. C. et al. Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material. Light: Science & Applications, 6, e17011 (2017).
Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material[J]. LSA, 2017,6(3). DOI: 10.1038/lsa.2017.11.
Ni, J. C. et al. Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material. Light: Science & Applications, 6, e17011 (2017). DOI: 10.1038/lsa.2017.11.
Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material
a type of structured beam with helical phase wavefronts and 'doughnut'-shaped intensity distributions
have been used to fabricate chiral structures in metals and spiral patterns in anisotropic polarization-dependent azobenzene polymers. However
in isotropic polymers
the fabricated microstructures are typically confined to non-chiral cylindrical geometry due to the two-dimensional 'doughnut'-shaped intensity profile of the optical vortices. Here we develop a powerful strategy to realize chiral microstructures in isotropic material by coaxial interference of a vortex beam and a plane wave
which produces three-dimensional (3D) spiral optical fields. These coaxial interference beams are generated by designing contrivable holograms consisting of an azimuthal phase and an equiphase loaded on a liquid-crystal spatial light modulator. In isotropic polymers
3D chiral microstructures are achieved under illumination using coaxial interference femtosecond laser beams with their chirality controlled by the topological charge. Our further investigation reveals that the spiral lobes and chirality are caused by interfering patterns and helical phase wavefronts
respectively. This technique is simple
stable and easy to perform
and it offers broad applications in optical tweezers
optical communications and fast metamaterial fabrication.
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