Microexplosions in bulk sapphire driven by simultaneously spatially and temporally focused femtosecond laser beams

Weibo Cheng, Zhaohui Wang, Xiaolong Liu, Ya Cheng, Pavel Polynkin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We report experimental results on the formation of microvoids in bulk sapphire produced through the single-shot illumination of the sample by near-infrared, simultaneously spatially and temporally focused (SSTF) laser beams. Compared with the cases of tightly focused femtosecond Gaussian and flattop beams, the SSTFs produce internal microvoids with significantly larger volumes and without cracks between the interaction sites, which may be beneficial for applications in volumetric data storage and for the studies of exotic, super-dense elemental phases contained in the densified shells surrounding the microvoids.

Original languageEnglish (US)
Pages (from-to)751-754
Number of pages4
JournalOptics letters
Volume48
Issue number3
DOIs
StatePublished - Feb 1 2023

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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