Diamond for optical thermalmometry

Thermal-activated long-persistent luminescence in diamond for wide-range contactless thermometry with extreme environments tolerance

Precise temperature measurement is crucial in science and industry, but conventional contact thermometers are unsuitable for nanoscale, fast-moving, or harsh environments. Optical thermometry, based on temperature-dependent luminescence, offers a contactless alternative but many luminescent materials lack stability under extreme conditions. Diamond, with its wide bandgap, defect-driven luminescent centers, and exceptional mechanical and thermal stability, provides a robust platform. Its long-persistent luminescence (LPL), governed by donor–acceptor pair recombination, is inherently temperature-dependent. Leveraging these properties, diamond-based thermometers promise wide-range, highly sensitive, and environment-tolerant temperature monitoring systems.

www.diasemi.us

San Francisco

8/20/2025