Optically controllable emitter array with pn-junction integrated Si tip

In this paper, a Si field emitter array with an ability of the optical switching of electron emission has been developed. Each emitter has pn junction at the apex to control emission current optically. Experiments of optical switching of electron emission have been demonstrated successfully. This concept of the optical control of emission can reduce the number of metal wires on the emission device; therefore, a high density emitter array can be achieved.