Dynamic conductance of mesoscopic waveguides

摘要

We report a theoretical investigation of dynamic conductance G(omega), for general ac frequency w, of two-dimensional mesoscopic waveguides whose transport is characterized by antiresonances. We calculate G(omega) by numerically evaluating nonequilibrium Green's functions. By tuning the ac frequency we observe photon-assisted resonant transport as well as a gradual smearing out of the antiresonances. The antiresonance causes the dynamic; response to vary between capacitive-like behavior to that of the inductive-like behavior. (C) 2001 American Institute of Physics. References: 35