  Dielectric laser acceleration draws upon nano-fabrication techniques to build
photonic structures for high gradient electron acceleration. At the small
spatial scales characteristic of these structures conventional accelerator
techniques become ineffective at stabilizing the beam dynamics. Instead we
propose a scheme to stabilize the motion by directly modulating the drive
laser, in analogy to a radio-frequency-quadrupole. Here we present a design for
a programmable `lattice' being built at UCLA's Pegasus laboratory. The
accelerator accepts an unmodulated 3.5 MeV electron beam and then bunches and
accelerates the beam by 1.5 MeV over a distance of 2 cm.
