Speaker
Description
Direct observation of the Cosmic Neutrino Background (CνB) and precise measurements of absolute neutrino mass require advanced detection technologies that can overcome existing hardware bottlenecks. Current cryogenic detectors struggle to simultaneously achieve sub-meV energy thresholds, high energy resolution, and nanosecond response times within a highly scalable architecture. To address this challenge, we propose the Superconductor-Coupled Semiconductor Electron-Multiplying (SuperEM) detector, a novel sensing framework based on an S-I-P-N heterojunction.
The SuperEM architecture utilizes the minimal Cooper-pair breaking gap of superconducting materials (e.g., ~0.35 meV for aluminum) to bypass the traditional semiconductor bandgap barrier, effectively lowering the initial excitation energy to the sub-meV regime. Following micro-energy deposition, non-equilibrium quasiparticles are injected into a semiconductor depletion region via Fowler-Nordheim field emission across a nano-scale insulator layer. By operating the semiconductor P-N junction at a deep-cryogenic temperature of 10 mK, lattice phonon scattering is highly suppressed, enabling low-fluctuation avalanche multiplication.
This topology physically decouples micro-energy sensing from in-situ charge amplification. Theoretical and initial experimental frameworks indicate that SuperEM can achieve an intrinsic energy resolution approaching 40 meV at 1 eV for pre-filtered experiments, alongside nanosecond pile-up mitigation for full-energy absorption measurements. Beyond neutrino physics, the SuperEM detector provides a versatile, highly scalable hardware foundation for light dark matter (LDM) searches, cosmic terahertz surveys, and in-situ radiation monitoring for superconducting quantum computers.
| 请选择分会 | 粒子物理实验技术 |
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