Time-dependent transport: Time domain recursively solving NEGF technique

We present a numerical method in this paper to calculate time-dependent transport properties in mesoscopic systems. This method recursively computes the non-equilibrium Greenʹs functions (NEGF) in the time domain. In the simulations, we utilize a dynamically allocated data structure to compute current densities in response to input signals of any time duration and arbitrary shape. To demonstrate the performance, we apply the proposed method to solve NEGF for time-dependent transport in resonant-tunneling devices (RTD) with a single resonant level. We also investigate how the electrodes’ energy band structure affects the transport properties.