Insights into the microphysics of ultrafast Bessel beam interaction with dielectrics

International audienceThe creation of dense plasmas inside solids by ultrafast lasers is crucial for applications such as EUV radiation,<br&gtwarm dense matter study or laser materials processing. It is conventionally difficult to create large volumes of<br&gtdense plasmas inside the bulk of dielectrics to benefit from pressure confinement. Here, we demonstrate that<br&gtfemtosecond Bessel beams generate overdense plasmas in single pulse over a very long, sub-wavelength rod. We<br&gtreport here on experimental and numerical investigations on the rich physics at play, that leads to extreme energy