Nature Communications, Published online: 29 August 2026; doi:10.1038/s41467-026-76701-2 Lanthanide nanotransducers can convert mid-infrared light into nearinfrared signals but suffer from weak emission. Here, authors couple Nd3 + /Yb3 + -doped nanoparticles with gold nanospheres to achieve silicon-readable detection with seven-fold improvement in specific detectivity relative to the pristine nanoparticles.