Dielectric geometric phase optical elements fabricated by femtosecond direct laser writing in photoresists

Xuewen Wang (1) , Aleksandr A Kuchmizhak (1, 2) , Etienne A Brasselet (3) , Saulius Juodkazis (4, 1)

1 Centre for Micro-Photonics [Hawthorn]
2 School of Natural Sciences [Vladivostok]
3 LOMA - Laboratoire Ondes et Matière d'Aquitaine
4 MCN - Melbourne Centre for Nanofabrication

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.

Domaines: Optique [physics.optics]

Xuewen Wang, Aleksandr A Kuchmizhak, Etienne A Brasselet, Saulius Juodkazis. Dielectric geometric phase optical elements fabricated by femtosecond direct laser writing in photoresists. Applied Physics Letters, 2017, 110 (18), pp.181101 (1-4). ⟨10.1063/1.4982602⟩. ⟨hal-01520555⟩