Model of coherent electron field emission from semiconductors through nanometer-wide dielectric coverings

A model of coherent electron field emission from a semiconductor substrate through a very thin (nanometer-wide) dielectric layer is developed. The model includes a separate approach for the electron transmission from the bulk, substrate conduction band and from the quasi-bound states induced by the applied field at the substrate-dielectric boundary. No artificial quantization condition is used for the energies of the quasi-bound states. "Resonant" behavior is found in the total emission current density, which may give rise to consistent enhancement as compared to the emission from bare substrate surface, in accordance with other results in the literature.