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Single-shot ultrafast laser processing of high-aspect-ratio nanochannels using elliptical Bessel beams

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Abstract

Ultrafast lasers have revolutionized material processing, opening a wealth of new applications in many areas of science. A recent technology that allows the cleaving of transparent materials via non-ablative processes is based on focusing and translating a high-intensity laser beam within a material to induce a well-defined internal stress plane. This then enables material separation without debris generation. Here, we use a non-diffracting beam engineered to have a transverse elliptical spatial profile to generate high-aspect-ratio elliptical channels in glass of a dimension 350nm×710nm and subsequent cleaved surface uniformity at the sub-micron level.

© 2017 Optical Society of America

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