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

Abstract : With a quest to develop rapid and reliable three-dimensional nanofabrication techniques for photonic and fluidic applications, we exploited the potential of zero-order Bessel beams for fabricating high aspect ratio nano-structures in fused silica glass. In particular, the energetic conditions towards stable and uniform nanovoid fabrication were explored, correlating the laser pulse energy and temporal duration. The underlying carrier and structural dynamics revealed through multiscale timeresolved microscopy techniques in the case of Bessel pulse excitation of silica glass were also studied. We discovered different material relaxation pathways corresponding to material modifications of different morphologies such as increased and decreased refractive index structures.