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

TY - JOUR

T1 - Phonon Effects on Population Inversion in Quantum Dots

T2 - Resonant, Detuned and Frequency-Swept Excitations

AU - Reiter, D.E.

AU - Luker, S.

AU - Gawarecki, K.

AU - dpz242, dpz242

AU - Machnikowski, P.

AU - Axt, V.M.

AU - Kuhn, T.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - The effect of acoustic phonons on different light-induced excitations of a semiconductor quantum dot is investigated. Resonant excitation of the quantum dot leads to the Rabi oscillations, which are damped due to the phonon interaction. When the excitation frequency is detuned, an occupation can only occur due to phonon absorption or emission processes. For frequency-swept excitations a population inversion is achieved through adiabatic rapid passage, but the inversion is also damped by phonons. For all three scenarios the influence of the phonons depends non-monotonically on the pulse area.

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

M3 - Journal article

SN - 0587-4246

VL - 122

SP - 1065

EP - 1068

JO - Acta Physica Polonica A

JF - Acta Physica Polonica A

IS - 6

ER -