Novel single- and double-gate race-track-shaped field emitter structures

In this paper, new single- and double-gate race-track-shaped field emitter structures are reported for the first time. The race-track-shaped edge emission is used to provide good uniformity and large field emission current density, and the double-gate control is used to provide small turn-on voltage. Experimental results show that the turn-on voltage of the single-gate structure is approximately 100 V, and the field emission current density is approximately 2.4 A/cm² which is over 12 times larger than that of the volcano-shaped emitter structure reported previously. Furthermore, numerical simulations show that turn-on voltage of the double-gate structure is reduced by 30% compared to the single-gate structure