The Way to Generating Sub-Femtosecond Pulse Trains with High-Order Stimulated Raman Scatterings

The generation of ultrashort pulses is the key to exploring the dynamic behaviors of matter on ever-shorter timescales. Sub-femtosecond pulses can be used to explore atomic-scale electron motion which can reveal the nature of changes in chemical reactions and the function of biological systems. Recent developments have shown that sub-2-fs pulse trains can be produced in an experiment through molecular modulation. In this paper, we experimentally demonstrate the potential of yielding sub-femtosecond pulse trains with eight or more high-order stimulated Raman scattering components; and report the current bottleneck of generating sub-femtosecond pulse trains via molecular modulation.