Abstract
In this paper we investigate the current density due to electrons emitted during normalirradiation of a toroidal quantum ring of a strongly degenerate wide-gap semiconductor.The computed results show that the current density increases in a step-like manner withincrease in the incident photon energy. Increased current density can be obtained byreducing the dimensions of the ring. The threshold energy for photoemission becomes anoscillatory function of the cross-sectional radius, and can be used as an important tool formonitoring parameters such as the cross-sectional radius and doping density.The threshold energy is, however, independent of the circumference of the ring.
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