A nanometric electron multiplexer

A simple nanostructure resonantly coupling two semiconductor quantum wires is proposed as an electron multiplexer, which selectively transfers electrons of a given energy E0E0 from one wire to the other, while letting all the neighbouring states within a certain energy range around E0E0 propagate virtually unaffected along the input wire. Closed-form expressions are derived for characteristic wire lengths within the coupling structure facilitating such a directional transfer, which enables one to determine optimal parameters for the device fabrication.