  The EDELWEISS collaboration searches for light Dark Matter (DM) particles
using germanium detectors equipped with a charge and phonon signal readout.
Using the Neganov-Trofimov-Luke effect, an rms resolution of 0.53 electron-hole
pair was obtained on a massive (33.4 g) Ge detector operated underground at the
Laboratoire Souterrain de Modane. This record sensitivity made possible a
search for Dark Photon DM down to 1 eV/c2 and to DM-electron interactions below
1 MeV/c2. This demonstrates for the first time the high relevance of cryogenic
Ge detectors in searches at low thresholds and is an important step of the
development of Ge detectors with improved performance in the context of the
EDELWEISS-SubGeV program.
