Spectroscopy of Quantum Emitters and Their Applications

Abstract

Temperature sensing is crucial in many areas such as in biology research. Group IV color centers in diamond have many advantages over other sensors. Detailed research on Tinvacancy (SnV) color center as thermometry is presented in this work, and a fiber thermometry probe based on Germanium-vacancy (GeV) is also demonstrated. Those results have shown the promising future of diamond color center thermometry and possibilities to combine multi color centers for more complicated thermal imaging.

Lead halide perovskite nanocrystal is a novel semiconductor that has gain much attention due to its extraordinary optical properties. Some of dark exciton properties such as its relative order to bright exciton in this nanocrystal still remain unclear mainly due to lack of dark exciton photoluminescence (PL). An intense dark exciton emission is demonstrated in this work taking advantage of strong quantum confinement. A systematic study on size dependency of dark exciton in this work also reveal the importance of quantum confinement in determining dark exciton properties and its future applications.