Research Group Develops Thermo-Photoluminescence for Rapid Imaging and Measurement
SICHUAN, China, May 20, 2020 — Today, the most common optical technique for imaging and measurement of thermal conductivity of semiconductors is time-domain thermoreflectance (TDTR), in which a femtosecond pump pulse is used to heat up the sample through a metal film. While widely adopted, the difficulties are well known. Besides the expensive femtosecond lasers, the samples have to be polished to provide a clean, flat surface for a controlled thermal contact with the metal film, so TDTR is invasive and requires careful