Abstract
In this paper, design and parameter optimization for the performance analysis of a Gate-All-Around GaN Nanowire Field Effect Transistor (GAA GaN NWFET) has been carried out based on the various quantum ballistic simulation models. The simulation results show a novel way to change the device mode of operation from Depletion-mode (D-Mode) to Enhancement mode (E-Mode) and vice-versa by varying the thickness of the nanowire channel ([Formula: see text], which has not been reported yet to the best of our knowledge. Also, the paper reveals novel approaches (i) threshold voltage ([Formula: see text] tuning using metal contact length ([Formula: see text], (ii) threshold voltage ([Formula: see text] tuning using metal electrode work functions ([Formula: see text] and (iii) threshold voltage ([Formula: see text] tuning using metal contact width ([Formula: see text]. The device has an [Formula: see text]/[Formula: see text] ratio of 105, suppressed off-state leakage in the range of 10[Formula: see text]–10[Formula: see text]A. The simulation work has been carried out on a commercially available ATLAS device simulator from Silvaco.
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