Dual Electron Waveguide Devices: the Quest for Electron Directional Coupling

概要

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In our quest to demonstrate electron directional coupling, the coherent tunneling of electrons between two electron waveguides, we have investigated split-gate dual electron waveguide devices. With the structure biased in a "leaky" electron waveguide configuration we have carried out extensive observations of one-dimensional (1D) to two-dimensional (2D) tunneling between a waveguide and a neighboring two-dimensional electron gas. These tunneling spectroscopy experiments have provided the first glimpse of the one-dimensional density of states of a 1D electronic system. We have also carried out experimental observations of 1D to 1D tunneling between two electron waveguides. Demonstrating electron directional coupling will still require the development of a new generation of ultrashallow heterostructures with sharp confining potential barriers.
社団法人応用物理学会の論文
1995-08-30