Abstract
We demonstrate an easy two-step maskless method for the fabrication of so-called compound fork-shaped gratings in nanomultilayer structures (NMLSs) based on chalcogenide glasses. Such elements allow one to generate different configurations of optical vortex (OV) beams with given topological charges (TCs). The used NMLS is particularly interesting because it enables one to realize the direct one-step writing of the surface relief without selective etching. We show that it is possible to control TCs of the generated OV beam arrays, their locations, and intensity. The proposed approach can easily be adapted to the fabrication of compound diffractive gratings performing the desired one- and two-dimensional generation and splitting of other structured laser beams.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Yue Zhao, Enliang Wang, Fulin Cao, and Changqing Xie
Opt. Lett. 46(24) 6059-6062 (2021)
Airong Zhao, Aline Pham, and Aurélien Drezet
Opt. Lett. 46(3) 689-692 (2021)
Mohammad H. Bitarafan, Shambhavee Annurakshita, Juha Toivonen, and Godofredo Bautista
Opt. Lett. 46(6) 1197-1200 (2021)