The brightness of a light source defines its applicability to nonlinear phenomena in science. Bright low-frequency terahertz (
Elison de Nazareth Matioli, Mohammad Rezaei
László Forró, Ferenc Simon, Bence Gábor Márkus, Sándor Kollarics
Ileana-Cristina Benea-Chelmus, Aleksei Gaier