科研之友
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摘要
We report experimental results on the formation of microvoids in bulk sapphire produced through the single -shot illumination of the sample by near-infrared, simultane-ously 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 benefi-cial for applications in volumetric data storage and for the studies of exotic, super-dense elemental phases contained in the densified shells surrounding the microvoids.
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单位中国科学院
