Title :
Space charge effects in strong-field emission from a nanostructured Si cathode
Author :
Keathley, P.D. ; Swanwick, M.E. ; Fallahi, Afshin ; Velasquez-Garcia, L.F. ; Kartner, Franz X.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
Ultrafast photoemission from a nanostructured Si-cathode array comprised of nano-sharp tips (~5 nm radius of curvature) was studied. Total current yield and electron spectra indicate a transition from multiphoton to strong-field emission followed by virtual cathode formation.
Keywords :
electron field emission; elemental semiconductors; multiphoton spectra; photoelectron spectra; silicon; space charge; Si; current yield; electron spectra; field emission; multiphoton spectra; nanostructured Si cathode; space charge effects; ultrafast photoemission; virtual cathode formation; Arrays; Cathodes; Free electron lasers; Photoelectricity; Silicon; Space charge; Surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
