Patent ID: 7135697
Filing Date: 2006-11-14
Classification: B82Y,H01L

Abstract:
1. A semiconductor quantum dot device comprising: (a) a multilayer semiconductor structure including a substrate, a back gate electrode layer, a quantum well layer, a bottom barrier layer between the quantum well layer and the back gate layer, and a top barrier layer above the quantum well layer; (b) a plurality of spaced electrode gates formed on the multilayer semiconductor structure, the electrode gates spaced from each other by a region beneath which the quantum dot may be defined, the electrodes formed to provide a quantum dot having an elongated length and a narrow width and an asymmetric confining potential along its length such that orbital excitation of an electron in the quantum dot results in lateral center of charge motion; and (c) a single electron sensitive electrometer adjacent to the quantum dot and coupled thereto to detect the change in charge resulting from the lateral movement of the center of charge of an electron changing orbitals in the quantum dot.