QUANTUM INTERFERENCE ELECTRONIC SWITCH

A novel planar electron waveguide coupler is proposed as an electronic switch. The structure consists of two quantum wires interconnected by a dual branch coupling scheme which is assumed to be controlled by an electrostatic potential. Switching is provided by tuning the phase re lations between the different scattered waves by the two coupling bran ch lines. Assuming ballistic transport, the analysis is conducted by s olving the time independent two-dimensional Schrodinger equation in or der to derive the conductance characteristics. At a resonant energy of 25 meV and for a waveguide width of 27.4 nm, over 90% of the electron wave has been transferred with a half picosecond time response.