We propose to use a femtosecond direct laser writing technique to realize dielectric optical elements from photo-resist materials for the generation of structured light from purely geometrical phase transformations. This is illustrated by the fabrication and characterization of spin-to-orbital optical angular momentum couplers generating optical vortices of topological charge from 1 to 20. In addition, the technique is scalable and allows obtaining microscopic to macroscopic flat optics. These results thus demonstrate that direct 3D photopolymerization technology qualifies for the realization of spin-controlled geometric phase optical elements.
Dielectric geometric phase optical elements fabricated by femtosecond direct laser writing in photoresists
Xuewen Wang, Aleksandr A. Kuchmizhak, Etienne Brasselet, Saulius Juodkazis; Dielectric geometric phase optical elements fabricated by femtosecond direct laser writing in photoresists. Appl. Phys. Lett. 1 May 2017; 110 (18): 181101. https://doi.org/10.1063/1.4982602
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