Imaging of bessel filaments in fused silica and impact on modelling the underlying light-matter physics

We have developed a strategy to image the nonlinear propagation of high-intensity femtosecond pulses while they propagate in fused silica. We have studied the propagation of Bessel beams in the regime where they allow for drilling high-aspect ratio nanochannels in single shot. Experimental results provide useful insights for the modelling.