Dual-grating dielectric accelerators driven by a pulse-front-tilted laser.

This paper investigates numerically dual-grating dielectric laser-driven accelerators driven by a pulse-front-tilted (PFT) laser, which extends the interaction length and boosts the electrons' energy gain. The optical system necessary to generate PFT laser beams with an ultrashort pulse duration of 100 fs is also studied in detail. Through two-dimensional particle-in-cell simulations, we show that such a PFT laser effectively increases the energy gain by (91 +/- 25) % compared to that of a normally incident laser with a waist radius of 50 mu m for a 100-period dual-grating structure.