Dejun Liu, Ph.D., is an assistant professor and master director at the school of physics and Optoelectronic Engineering, Shenzhen University. He graduated with a doctoral degree from Chongqing University of technology in 2009, majoring in material forming and control engineering. He graduated from Chongqing University with a master's degree in material science and Engineering in 2012. In 2018, he graduated from the photon research center of Dublin Institute of technology, Ireland. Since December, 2018, he has joined the school of physics and optoelectronic engineering of Shenzhen University and has successively served as a full-time associate researcher and assistant professor. He serves as a guest editor for the journal Sensors. He has published more than 50 SCI papers in authoritative journals in the optical field such as Optics Letters.