Sándor Bordács is an associate professor at the BME. On one hand his research focuses on the optical properties of magnets, that he studies by THz, infrared and visible spectroscopy. He demonstrated that non-centrosymmetric magnets can absorb the light for one propagation direction whereas they are transparent when the light propagation is reversed. Since the transparent and absorbing directions can be reversed by external magnetic and electric fields, this phenomenon can find applications in switchable diodes for light. Since 2015, he has been studying the whirling patterns of spins, the so-called magnetic skyrmions and spin spirals. With his colleagues he discovered Néel-type magnetic skyrmions in bulk polar magnets, and showed that these skyrmions can possess a complex electric polarization pattern as well. He has been awarded the Premium Postdoctoral grant of the MTA, Bolyai medal and the Junior Prima prize.