Optoelectronic surface emitters of terahertz radiation from copper chalcogenidesAdomavicius, Ramunas; Krotkus, Arunas; Šustaviciute, R.; Molis, Gediminas; Kois, Julia; Bereznev, Sergei; Mellikov, Enn; Gashin, P.Electronics letters2007 / 25, p. 1458-1459 https://doi.org/10.1049/el:20072035