Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 22: Superconductivity – Poster I
TT 22.28: Poster
Monday, March 9, 2026, 18:00–20:00, P1
MMC-based photon and phonon detector for scintillating crystals at mK temperatures — •Ioana-Alexandra Nitu, Christian Enss, Andreas Fleischmann, Clara Marie Günther, Daniel Hengstler, Sebastian Hilscher, Ashish Jadhav, Cagla Mahanoglu, Andreas Reifenberger, and Loredana Gastaldo — Kirchhoff Institute for Physics, Heidelberg University
Scintillating bolometers operated at mK temperatures provide a means to probe for neutrinoless double beta decay (0 ν β β) and Dark Matter. The ratio of light to heat signals permits discrimination between heavy particles, for instance α particles, and lighter ones, like β or γ particles. The AMoRE collaboration uses separate photon and phonon detectors based on metallic magnetic calorimeter (MMC) technology to search for 0 ν β β in 100Mo using LiMoO4 crystals.
We present an integrated photon-phonon (P2) detector concept, where both detectors are microfabricated on the same 3-inch silicon substrate and thermally separated by etched trenches. Presently, the optimization of the photon and phonon detectors is done separately. The development of the photon detector has been completed and preliminary results validate fabrication procedures. A phonon detector prototype was designed and microfabricated using the same steps as the pre-existing photon detector. We present the fabrication steps to obtain the target mechanical and thermal properties and discuss preliminary results in comparison to the expected performance.
Keywords: Metallic Magnetic Calorimeter; Microfabrication; Scintillating Crystal; Detector Physics; Neutrino Physics