Phonon detection in single crystalline silicon with superconducting tunneling junctions
Abstract
Recent experimental results on phonon detection with Sn/SnOx/Sn superconducting tunneling junctions (STJ) are reported. Phonons are generated in a single-crystalline Si substrate by means of alpha-radiation. Two STJs, evaporated on top of the substrate, are used as detectors. At temperatures below 0.9 K a strong correlation is found between the energies deposited in both junctions. Marked differences are observed between frontside and backside irradiation of the substrates. Phonon focusing, due to the anisotropic elastic constants of Si, is held responsible for the observed energy correlations.
- Publication:
-
Low temperature Detectors for Neutrinos and Dark Matter III
- Pub Date:
- 1990
- Bibcode:
- 1990ltdn.work..201R
- Keywords:
-
- Phonons;
- Silicon Radiation Detectors;
- Single Crystals;
- Superconductors;
- Tunnel Diodes;
- Alpha Particles;
- Cryogenic Temperature;
- Ionizing Radiation;
- Instrumentation and Photography