Modelling of emission processes in Matlab

The Matlab PDE Toolbox and Comsol Multiphysics coupling with Matlab via LiveLink are used in mathematical and computer modeling of field electron emission from emitter-arrays, as well as from single tip field electron emitter. Physical and mathematical models, computational methods and algorithms of stand alone Matlab application with graphical user interface are presented. The simulation results by the example of two different diode structures are also presented. Two generic cone-shape and cylindrical wedge-shape non-gated emitter-array diodes are considered. The effects of the variations in device geometrical structure and parameters on its potential distribution, electric field, and emission current are discussed. The current variation rate with respect to the tip-collector distance is calculated.