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Controllable double-helical microstructures by photonic orbital angular momentum for chiroptical response

Authors :
Chenchu Zhang
Shunli Liu
Deng Pan
Bing Xu
Dong Wu
Yanlei Hu
Jiawen Li
Jincheng Ni
Shengyun Ji
Jiaru Chu
Zhaoxin Lao
Source :
Optics letters. 46(6)
Publication Year :
2021

Abstract

Three-dimensional helical microstructures are abundant in nature and can be applied as chiral metamaterials for advanced nanophotonics. Here we report a flexible method to fabricate double-helical microstructures with single exposure by recording the chirality of incident optical vortices. Two coaxial optical vortices can interfere to generate a helical optical field, confirmed by the numerical simulation. The diameters of double-helical microstructures can be tailored by the magnitude of topological charges. This fast manufacturing strategy provides the opportunity to efficiently yield helical microstructures. Finally, the chirality of double-helical microstructures can be reversibly read by optical vortices, demonstrating a strong chiroptical response.

Details

ISSN :
15394794
Volume :
46
Issue :
6
Database :
OpenAIRE
Journal :
Optics letters
Accession number :
edsair.doi.dedup.....e8e3af38a2f230d80bf571bad7f95c12