  A three step model for high harmonic generation from impurities in solids is
developed. The process is found to be similar to high harmonic generation in
atomic and molecular gases with the main difference coming from the
non-parabolic nature of the bands. This opens a new avenue for strong field
atomic and molecular physics in the condensed matter phase. As a first
application, our conceptual study demonstrates the feasibility of tomographic
measurement of impurity orbitals.
