Efficient generation of arrays of closed-packed light rings

We investigate the generation of closed-packed light rings with a minimum possible diameter using a combination of a light ring distribution generator and a diffractive beam splitter. As a light ring distribution generator, we use the wellknown S-waveplate and generate three different types of ring-shaped laser beams: an azimuthally polarized Gaussian beam, a first-order circularly polarized optical vortex beam, and a first-order linearly polarized optical vortex beam. Our modeling and experimental results show that the azimuthally polarized Gaussian beam is the best solution for splitting in comparison with the other types of beams. These results can be used in applications of high-throughput laser micro- and nanopatterning materials for the fabrication of microlasers by direct laser ablation of a thin film on glass that have great potential in optical communications and sensing applications.

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