Spontaneous Emission in Quantum Wells

This lecture covers the spontaneous emission process in quantum wells, focusing on the electron-phonon interaction and the impact of electric fields on optical transitions. It explains the simplification of photoluminescence spectra in quantum wells compared to bulk materials and discusses the radiative recombination rate decrease due to electric fields. The lecture also delves into the quantum confined Stark effect, describing the formation of dipoles, decrease in oscillator strength, and increase in radiative lifetime. Various experimental facts related to photoluminescence intensity and energy shifts in quantum wells are presented, along with the role of interfaces in exciton behavior. The discussion extends to non-polar quantum wells and the transverse Stark effect in 2D systems.