Photoluminescence (PL) spectroscopy is a contactless, nondestructive method to probe the electronic structure of materials. Our capabilities include: various excitation wavelengths that allow for varying levels of volume excitation; a detection range extending from 0.4 to 2.7 µm; sample temperatures of 4 to 300 K; and mapping capabilities with 1- to 2-µm spatial resolution on the Fourier-transform-based system. The intensity and spectral content of the emitted photoluminescence is a direct measure of various important material properties, including: