Infrared to visible frequency upconversion temperature sensor based on 'Er POT.3+'-doped PLZT transparent ceramics - de Camargo, Andrea Simone Stucchi; Possatto, João Fernando; Nunes, Luiz Antônio de Oliveira; Botero, Ériton Rodrigo; Andreeta, Érika R. M.; Garcia, Ducinei; Eiras, José Antonio (Solid State Communications, 2006)