Backward terahertz emission from two-color laser induced plasma spark Aleksandr Ushakov, Pavel Chizhov, Vladimir Bukin, Nikolay Panov, Daniil Shipilo, Olga Kosareva, Andrei Savel’ev and Sergey Garnov EPJ Web Conf., 195 (2018) 03010 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819503010