Design of a Dielectric Laser Accelerator with the On-chip Pulse-front-tilt Method

Abstract

In this research, a photonic crystal for dielectric laser accelerator has been designed and analyzed by conducting finite-domain-time-differential (FDTD) simulations. The photonic crystal of dielectric materials, such as Si or SiO2, can confine electric field components of a laser pulse in space when it is designed as a cavity structure. The longitudinal electric field components can serve as a driving force for electrons. A maximum acceleration gradient is expected when the electron and acceleration field phases are matched. The phase matching can be achieved by tilting the front of the input laser pulse. In this study, a combined structure of a micro-scale prism and periodic cavities was considered to tilt the pulse front. The calculation of the acceleration field by FDTD simulations can give an energy gain of the incident electrons in dielectric laser acceleration (DLA).