Theoretical and experimental results of a fully ballistic nano-FET with high gain

We report on the experimental evidence of a fully ballistic nano-FET with a voltage gain higher than 1 which is based on a 1D quantum ballistic conductor. In such a FET, the transconductance and the output conductance are basically modulated by the 1D subbands and the experimental results can theoretically be explained based on the Landauer-Buttiker formalism and the Buttiker model of the saddle-point constriction.