Radio frequency operation of clocked quantum-dot cellular automata latch

The radio frequency operation of a single-electron latch based on $Al–AlOx–Al$ tunnel junctions is presented. By capacitively coupling the latch to a radio frequency single electron transistor, charge switching on the microsecond timescale is demonstrated. The fast switching and high repeatability of the latch response indicates that high speed operation of pipelines, signal fan-outs, and more complex logic devices are possible with this technology. The experimental technique developed is also promising for enabling the investigation of the intrinsic switching speed in electronic quantum-dot cellular automata-based circuits.