Figure 1
From: Optimally Sharp Energy Filtering of Quantum Particles via Homogeneous Planar Inclusions
(a) The setup of the presented energy filter comprising a homogeneous planar inclusion with effective mass m, macroscopic potential energy V and thickness d into a specific background of effective parameters (m0, V0). The structure is excited by a normally incident electron beam of kinetic energy E. The considered structures correspond to quantum well configurations as shown in the schematic, namely to V < V0 . (b) Indicative variation of the transmissivity of the filter τ(E) for 0 < E < 2E0, where E0 is the selecting energy. The residual transmissivity τ2(E0) at E = 2E0 and the half-power energy bandwidth B(E0) are also defined. (c) Combinations of relative effective masses m/me and macroscopic potential energies V (in eV) of the materials populating our list used in the followed optimization.
