Yao Fu

TL;DR: It is concluded that a postionization multiple-state coupling, through which the population can be transferred from the X2Σ_{g}^{+} state of N_{2} to the first electronically excited A^{2}Π_{u} state, leads to the depletion of the population in the X 2ΣΣ g state, and consequently, to thepopulation inversion between the X^{2]Σ{g}+ state and the B 2΢

TL;DR: By solving the time-dependent Schrödinger equation, the oscillations in the three different frequency ranges are reproduced and it is shown that the coherent population transfer among the three electronic states of N_{2}^{+} creates the population inversion between the B^{2}Σ_{u} and X-X-X states.

TL;DR: In this article, an ultrashort femtosecond laser was used to fire a lean methane/air mixture with a 100% success rate, and the resulting early OH radical yield significantly increases as the laser energy reaches the ignition threshold, showing a clear boundary for misfire and fire cases.

TL;DR: The results offer a promising route to efficient population transfer among vibrational and electronic levels of molecules by a precisely designed intense laser field.

TL;DR: In this paper, the authors demonstrate an approach for rapid, standoff fabrication of multi-functional surfaces with super-hydrophobic and antireflective properties on irregularly-shaped samples, by texturing them with femtosecond laser filaments in air, followed by chemical fluorination treatment.