Dynamic conductance of a nanowire cross junction

The dynamic conductance of a nanowire cross junction is investigated with the scattering matrix approach including the effect of the displacement current. The intrawire conductance is basically inductive, but it is capacitative near to a quasibound state. The interwire conductance is basically capacitative, except near a quasibound state where it is inductive. In 9-18 nm wires, interwire transmission of terahertz signals is suppressed for Fermi energy near to the first subband edge and the quasibound state below the second subband, thus limiting the junction's operating speed. For these Fermi energies, the maximum operation frequency decreases with the increase in the wire diameter. © 2007 American Institute of Physics.