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The effect of acoustic phonons on different light-induced excitations of asemiconductor quantum dot is investigated. Resonant excitation of the quantumdot leads to Rabi oscillations, which are damped due to the phonon interaction.When the excitation frequency is detuned, an occupation can only occur due tophonon absorption or emission processes. For frequency-swept excitations apopulation inversion is achieved through adiabatic rapid passage, but theinversion is also damped by phonons. For all three scenarios the influence ofthe phonons depends non-monotonically on the pulse area.

Phonon Effects on Population Inversion in Quantum Dots: Resonant, Detuned and Frequency-swept Excitations