  Proton emission from nuclei via the nuclear photoeffect in the combined
electromagnetic fields of a gamma-ray photon and an intense laser wave is
studied. An S-matrix approach to the process is developed by utilizing methods
known from the theory of nonperturbative laser-atom interactions. As a specific
example, photo-proton ejection from halo nuclei is considered. We show that,
due to the presence of the laser field, rich sideband structures arise in the
photo-proton energy spectra. Their dependence on the parameters and relative
orientation of the photon fields is discussed.
