Surface plasmon driven lowering of the electron emission order in a carbon/gold bilayer film

摘要

We demonstrate the reduction of the nonlinear surface plasmon driven electron emission order from a bilayer of electron beam evaporated carbon (eC) and gold (Au). Higher confined electric fields, and the presence of sp~2/sp~3 clustering in the eC layer increase the electron emission at lower orders via field-driven energy gain. This bilayer provides a platform for ultrafast surface plasmon driven electron sources.