Fast-particle energy loss to a quantum well

Abstract

Electron energy loss spectroscopy (EELS) to a single GaAs–AlGaAs quantum well is considered for a charged particle moving parallel to the two-dimensional electron gas (2DEG) within the framework of the random-phase approximation (RPA). For the single-quantum well structure, a modulation-doped GaAs–AlGaAs heterostructure is considered. The Schrödinger–Poisson solver is used to obtain the electron eigenstates. We present theoretical results for the electron energy loss to intersubband and intrasubband plasmons and particle–hole modes using the inverse dielectric function (IDF) formalism.