Guichuan Xing is currently an Associate Professor at the Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China. Dr. Xing’s primary research interest is focused on developing and applying ultrafast nonlinear spectroscopic techniques to probing, understanding and controlling the fundamental charge and energy carrier generation, transport and relaxation in novel optoelectronic systems for energy conversion/storage and light emission applications. He has published more than 200 articles in peer-reviewed scientific journals.