2D Simulation Models for Quantum Mechanical Effects

ductor devices. A self consistent Schrodinger – Poisson solver allows calculation of bound state energies and associated carrier wave functions self consistently with electrostatic potential. Schrodinger solvers can be combined with Non-equilibrium Green’s Function (NEGF) Approach in order to model ballistic quantum transport in 2D or cylindrical devices with strong transverse confinement. An alternative approach to modeling subband transport in nanoscale devices is given by Mode-Space Drift-Diffusion Model, which combines transverse Schrodinger with 1D drift-diffusion equations. A quantum moment transport model allows simulation of confinement effects on carrier transport and yet keeps the simplicity of a conventional drift diffusion approach. It also allows quantum confinement effects to be included in the energy balance/hydrodynamic transport model. A quantum well model takes confinement into account when computing gain and spontaneous recombination in light emitting devices. Quantum also has non-local tunneling models which calculate tunneling current by solving the Schrodinger equation. These can optionally include the effects of quantum confinement on tunneling currents and can be used for band-to-band and oxide tunneling.