Germanium target sensed by phonon-mediated kinetic inductance detectors
Cryogenic phonon detectors are adopted in experiments searching for dark matter interactions or coherent elastic neutrino-nucleus scattering, thanks to the low energy threshold they can achieve. The phonon-mediated sensing of particle interactions in passive silicon absorbers has been demonstrated with kinetic inductance detectors (KIDs). Targets with neutron number larger than silicon, however, feature a higher cross section to neutrinos, while multi-target absorbers in the dark matter experiments would provide a stronger evidence of a possible signal. In this work, we present the design, fabrication, and operation of KIDs coupled to a germanium absorber, achieving phonon-sensing performance comparable to silicon absorbers. The device introduced in this work is a proof of concept for a scalable neutrino detector and for a multi-target dark matter experiment.
Authors
- M. Vignati (ORCID: https://orcid.org/0000-0002-8945-1128)
- V. Guidi (ORCID: https://orcid.org/0000-0001-9726-8481)
- A. Monfardini (ORCID: https://orcid.org/0000-0001-5337-5533)
- A. Cruciani (ORCID: https://orcid.org/0000-0003-2247-8067)
- U. Chowdhury (ORCID: https://orcid.org/0000-0002-1857-2598)
- G. del Castello (ORCID: https://orcid.org/0000-0001-7182-358X)
- A. Mazzolari
- D. Delicato (ORCID: https://orcid.org/0009-0005-0516-6872)
- Giuseppe Pesce (ORCID: https://orcid.org/0000-0001-5616-8599)
- L. Bandiera (ORCID: https://orcid.org/0000-0002-5537-9674)
- D. Angelone
- M. Romagnoni (ORCID: https://orcid.org/0000-0002-2775-6903)
- M. Calvo (ORCID: https://orcid.org/0000-0002-8752-6325)
- M. del Gallo Roccagiovine (ORCID: https://orcid.org/0009-0006-5861-7443)
- M. Folcarelli
- M. Cappelli (ORCID: https://orcid.org/0009-0002-6148-5964)
Institutions
- Institut polytechnique de Grenoble (FR)
- Centre National de la Recherche Scientifique (FR)
- University of Ferrara (IT)
- Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT)
- Institut Néel (FR)
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma I (IT)
- Sapienza University of Rome (IT)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2025-04-14
- DOI
- https://doi.org/10.1063/5.0253206
- Citations
- 2
- Primary Topic
- Superconducting and THz Device Technology
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- HORIZON EUROPE European Research Council