Abstract
The scattering matrix approach (SMA) is a new technique for solving the space-dependent Boltzmann equation in semiconductor devices. In this paper we apply the SMA to examine electron transport in a simple AlGaAs/GaAs heterojunction bipolar transistor. The results demonstrate that the scattering matrix approach resolves off-equilibrium transport with the accuracy of a Monte Carlo simulation while also treating near-equilibrium transport and injection across high-energy barriers. These results establish the viability of the SMA for simulating carrier transport in advanced, compound semiconductor devices.