Materials processing with a tightly focused femtosecond vortex laser pulse

2010/06/01 by Hnatovsky, Cyril, Shvedov, Vladlen G., Krolikowski, Wieslaw +1 · 2 citations
#FOS: Physical sciences #Optics (physics.optics)

paper · doi:10.48550/arxiv.1006.0100

Abstract

This letter is the first demonstration of material modification using tightly focused femtosecond laser vortex beams. Double-charge femtosecond vortices were synthesized with the polarization-singularity beam converter described in Ref [1] and then focused using moderate and high numerical aperture optics (viz., NA = 0.45 and 0.9) to ablate fused silica and soda-lime glasses. By controlling the pulse energy we consistently machine high-quality micron-size ring-shaped structures with less than 100 nm uniform groove thickness.

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