Today lasers can generate terawatts (1012 watts) or even petawatts (1015 watts), of optical power that can be focused down to spots as small as a few microns to generate fields on the order of 1011 V/cm. Atoms exposed to such tremendous fields ionize dozens of electrons within a few optical cycles of the laser light. Photoelectrons in this environment can absorb hundreds of thousands of laser photons entering the relativistic regime with speeds greater than v/c≈0.9. Furthermore, the dynamics
