Materials processing with tightly focused femtosecond vortex laser beams
Optics
2015-05-19 v1
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.
Cite
@article{arxiv.1006.0292,
title = {Materials processing with tightly focused femtosecond vortex laser beams},
author = {Cyril Hnatovsky and Vladlen G. Shvedov and Wieslaw Krolikowski and Andrei V. Rode},
journal= {arXiv preprint arXiv:1006.0292},
year = {2015}
}
Comments
8 pages, 3 figures, 10 references; submitted to Appl. Phys. Lett. on May 31, 2010