Dopant atoms in semiconductors can be ionized with ∼10 meV energy depositions, allowing for the design of low-threshold detectors. We propose using doped semiconductor targets to search for sub-MeV dark matter scattering or sub-eV dark matter absorption on electrons. Currently unconstrained cross sections could be tested with a 1 g-day exposure in a doped detector with backgrounds at the level of existing pure semiconductor detectors, but improvements would be needed to probe the freeze-in target. We discuss the corresponding technological requirements and lay out a possible detector design.
@article{arxiv.2212.04504,
title = {Doped Semiconductor Devices for sub-MeV Dark Matter Detection},
author = {Peizhi Du and Daniel Egaña-Ugrinovic and Rouven Essig and Mukul Sholapurkar},
journal= {arXiv preprint arXiv:2212.04504},
year = {2022}
}