Three-dimensional chiral microstructures fabricated by structured optical vortices in isotropic material
| Autor: | Jincheng Ni, Chenchu Zhang, Chaowei Wang, Liang Yang, Dong Wu, Jiawen Li, Yanlei Hu, Bing Xu, Jiaru Chu, Zhaoxin Lao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Plane wave Holography FOS: Physical sciences Physics::Optics 02 engineering and technology 01 natural sciences law.invention 010309 optics Optics law 0103 physical sciences Light beam two-photon fabrication Spatial light modulator business.industry coaxial interference Metamaterial chiral microstructure 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optical tweezers Original Article Coaxial optical vortex 0210 nano-technology business Optical vortex Optics (physics.optics) Physics - Optics |
| Zdroj: | Light, Science & Applications |
| ISSN: | 2047-7538 2095-5545 |
| Popis: | Optical vortices, as a kind of structured beam with helical phase wavefronts and doughnut shape intensity distribution, have been used for fabricating chiral structures in metal and spiral patterns in anisotropic polarization-dependent azobenzene polymer. However, in isotropic polymer, the fabricated microstructures are typically confined to non-chiral cylindrical geometry due to two-dimensional doughnut intensity profile of optical vortices. Here we develop a powerful strategy for realizing chiral microstructures in isotropic material by coaxial interference of a vortex beam and a plane wave, which produces three-dimensional (3D) spiral optical fields. This coaxial interference beams are creatively produced by designing the contrivable holograms consisting of azimuthal phase and equiphase loaded on liquid-crystal spatial light modulator. Then, in isotropic polymer, 3D chiral microstructures are achieved under illumination of the 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 the interfering patterns and helical phase wavefronts, respectively. This technique is simple, stable, and easy-operation, and offers broad applications in optical tweezers, optical communications and fast metamaterial fabrication. 17 pages, 7 figures |
| Databáze: | OpenAIRE |
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