Dr. Huizhong Xu, professor of physics in the Department of Physics and Astronomy directs the nano-opto-biophysics laboratory at San Francisco State University. Prior to joining SFSU, Dr. Xu was associate professor of physics at St. John's University.

Dr. Xu obtained his B.S. in applied physics from Fudan University in 1997, his M.A. in physics from the City College of New York in 2000, and his Ph.D. in physics from the University of Maryland in 2004. During his doctoral study at the University of Maryland, he and his colleagues demonstrated first evidence for entangled macroscopic quantum states, and observed first spectroscopic evidence for entanglement of three macroscopic objects. From 2004 to 2008, he worked as a postdoctoral associate under Watt Webb at Cornell University investigating advanced biological imaging techniques with nano-optics. He has been the recipient of several grants including an NSF CAREER award in 2010.