Ultrafast plasmon enhanced electron emission and novel scaling laws for space-charge-limited current

In this paper, we report our recent works on modeling of ultrafast laser induce electron emission from a sharp tip and recent progress about space-charge-limited (SCL) current. We first study the pulse shape effect on electron emission by solving the time dependent Schrödinger equation. Carrier envelope phase effect is analyzed. Later we develop a single electron model to study the space charge (SC) effect in vacuum diode. The Coulomb blockage effect and THz frequencies transport behavior are found. A multidimensional model is used to study the SC effect on electron emission from a tip. We conclude several novel scaling for SCL current. For the last part, we present our experiment results about electron injection into two layer structure. Improvement on resistive switching compared with one layer structure is observed.