Scientists of the International Institute «Photonics and Optical Information Technology» of ITMO University for the first time in the world measured nonlinearities in the terahertz frequency range.
Researchers from Laboratory of Femtosecond Optics and Femtotechnologies of ITMO University have, for the first time in history, managed to directly measure the nonlinear refractive index of matter in the terahertz range. The results of their experiments were compared with previously existing theoretical predictions in order to confirm the presence of nonlinear effects. The obtained data can be used to control light, as well as in fundamental and biomedical research. The results have been published in Optics Express.