3D Nano-Fabrication Using Controlled Bessel-Glass Interaction in Ultra-fast Modes

International audienceWith a quest to develop rapid and reliable three-dimensional nanofabrication techniques for photonicand fluidic applications, we exploited the potential of zero-order Bessel beams for fabricatinghigh aspect ratio nano-structures in fused silica glass. In particular, the energetic conditions towardsstable and uniform nanovoid fabrication were explored, correlating the laser pulse energy and temporalduration. The underlying carrier and structural dynamics revealed through multiscale timeresolvedmicroscopy techniques in the case of Bessel pulse excitation of silica glass were also studied.We discovered different material relaxation pathways corresponding to material modificationsof different morphologies such as increased and decreased refractive index structures