Improved drive-current into nanoscaled channels using electrostatic lenses

The contact regions in nanoscaled transistors play an increasingly important role in the overall performance of the devices. An electrostatic lens in the source contact region to focus a beam of electron wave packets into a nanoscaled channel is investigated here, using a Wigner Ensemble Monte Carlo simulator. An improvement in the drive-current is achieved by reducing reflections from the surrounding oxide. The associated modifications to the momentum distributions are readily shown by using the phase space description of the Wigner formalism.