Dror Fixler is an Israeli physicist specializing in optics. He is the director of the Bar-Ilan institute of nanotechnology and advanced materials, a Professor of Electrical engineering and Nanophotonics at Bar-Ilan University in Ramat Gan, Israel. He is also a visiting professor in Technical Institute of Physics and Chemistry, China. He is also an Israeli Orthodox rabbi and posek, and a student of Rabbi Nahum Eliezer Rabinovitch.