  Dark matter with mass below about a GeV is essentially unobservable in
conventional direct detection experiments. However, newly proposed technology
will allow the detection of single electron events in semiconductor materials
with significantly lowered thresholds. This would allow detection of dark
matter as light as an MeV in mass. Compared to other detection technologies,
semiconductors allow enhanced sensitivity because of their low ionization
energy around an eV. Such detectors would be particularly sensitive to dark
matter with electric and magnetic dipole moments, with a reach many orders of
magnitude beyond current bounds. Observable dipole moment interactions can be
generated by new particles with masses as great as 1000 TeV, providing a window
to scales beyond the reach of current colliders.
