Figure 4
From: Enhanced hot electron lifetimes in quantum wells with inhibited phonon coupling
Phonon density of states and dispersion calculated using DFT analysis for (a) AlSb and (b) InAs. The shaded regions indicate the phonon band gap. Also shown are examples of the Klemens (black) and Ridley (red) relaxation channels. (c) The magnified image of the hot electron distribution (full red circles) shown in the dotted circle illustrates the relaxation of carriers through LO phonon emission (solid red arrows) and the subsequent generation of LA phonons (solid yellow bolts). (d) Raman spectrum of GaAs (black), InAs (red), and AlAs0.16Sb0.84 (green) reference samples, and the full InAs/AlAs0.16Sb0.84 multi-quantum-well structure (blue).
