Observation of Two-photon Photoemission from Cesium Telluride Photocathodes Excited by a Near-infrared Laser

H. Panuganti, P. Piot

We explore nonlinear photoemission in cesium telluride (Cs${}_2$Te) photocathodes where an ultrashort ($\sim 100$ fs full width at half max) 800-nm infrared laser is used as the driv…