Laser printed nano-gratings: orientation and period peculiarities

• DOI: 10.1038/srep39989
• Publication Date: 2017-01-09T10:24:08Z
• Authors: Valdemar Stankevič; Gediminas Račiuka...; Francesca Bragheri; Xuewen Wang; Eugene G. Gamaly; Roberto Osellame; Saulius Juodkazis
• Keywords: fused silica; FOS: Physical sciences; 535; 02 engineering and technology; femtosecond laser micromachining; 0210 nano-technology; Article; nanogratings; Physics - Optics; Optics (physics.optics)

Abstract Understanding of material behaviour at nanoscale under intense laser excitation is becoming critical for future application nanotechnologies. Nanograting formation by linearly polarised ultra-short pulses has been studied systematically in fused silica various pulse energies 3D printing/writing conditions, typically used the industrial fabrication optical elements. The period nanogratings revealed a dependence on orientation scanning direction. A tilt nanograting wave vector fixed polarisation was also observed. mechanism responsible this peculiar dependency several features writing direction qualitatively explained considering heat transport flux presence electric field, rather than temporal and spatial chirp beam. confirmed vectorial nature light-matter interaction opens new control processing with precision.