Absence of Space-Charge-Limited Current in Unconventional Field Emission

2D Planar PIC Simulation of Space Charge Limited Current With Geometrical Parameters, Varying Temporal-Profile and Initial Velocities

“…Since the actual electron injection is time-dependent and energy-dependent, these parts deserve further studies. Last but not the least, as the field emission is a more common electron emission method, and the transition from FN law to CL law is practical [49], [50] especially under the rough surface condition [51], it is urged to take all the demands above into our codes in the future.…”

Analytical Model of Optical-Field-Driven Subcycle Electron Tunneling Pulses from Two-Dimensional Materials

“…Although completely reaching the limit is challenging, understanding the physics of such saturation is important. Note that such a source-limited emission behavior due to 2D materials is completely different from the space-charge limitation. , …”

“…Although completely reaching the limit is challenging, understanding the physics of such saturation is important. Note that such a source-limited emission behavior due to 2D materials 62 is completely different from the space-charge limitation. 23,24 We now consider the case of optical-field tunneling of electrons that occurs vertically from the plane of 2D materials, where dc field F 0 and optical field F 1 (t) are considered to be perpendicular to the 2D surface (cf.…”

Universal Model of Optical-Field Electron Tunneling from Two-Dimensional Materials

“…Such saturation reveals a dramatic consequence of the reduced dimensional of 2D material, in which the emission current saturates due to limited availability of electrons. Such a source-limited emission behavior [56] is completely different from the space-charge limitation of traditional bulk materials [24,25], and shall offer a distinctive high-field transport signature of 2D-materialbased electron optical-field emitters.…”