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24 April 2018 Formation of optical vortices with all-glass nanostructured gradient index masks
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Proceedings Volume 10712, Optical Manipulation Conference; 1071215 (2018)
Event: SPIE Structured Light, 2018, Yokohama, Japan
We report a development of microscopic size gradient index vortex masks using modified stack-and-draw technique. Vortex mask has a form of tens of microns thick, flat-surface all-glass plate. Its functionality is determined by internal nanostructure composed of two types of soft glass nanorods. Their spatial arrangement ensures that the average refractive index mimics continuous refractive index distribution imposing azimuthal phase modulation of optical beam. The mask of thickness of 40 microns is used to demonstrate generation of optical vortices with charges 1 and 2, in the femtosecond and cw regimes, respectively.
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Krzysztof Switkowski, Alicja Anuszkiewicz, Adam Filipkowski, Dariusz Pysz, Ryszard Stepien, Wieslaw Krolikowski, and Ryszard Buczynski "Formation of optical vortices with all-glass nanostructured gradient index masks", Proc. SPIE 10712, Optical Manipulation Conference, 1071215 (24 April 2018);

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