Absolute measurement of the ultrafast nonlinear electronic and rovibrational response in H₂ and D₂

الأصل · EN

The electronic, rotational, and vibrational components of the ultrafast optical nonlinearity in H₂ and D₂ are measured directly and absolutely at intensities up to the ionization threshold of 10¹⁴ W/cm². As the most basic nonlinear interactions of the simplest molecules exposed to high fields, these results constitute a benchmark for high field laser-matter theory and simulation.