Three-level gas systems and their interaction with radiation

Distribution radiale des atomes excités dans une colonne positive de néon

“…Nous traçons ensuite la courbe normalisée qui représente pour une raie et des conditions de décharge données le profil radial de la densité d'atomes absorbants. [4] que ceux-ci sont peuplés par collisions électroniques, sur les atomes dans l'état fondamental d'une part (processus I), et sur les atomes métastables de la configuration 2p' 3s d'autre part (processus II). Leur désexcitation est radiative (probabilité A d'émission spontanée).…”

Raman Coherence Beats from Entangled Polarization Eigenstates in InAs Quantum Dots

“…Details of this differential transmission (DT) setup can be found in [27]. The nonlinear polarization arises from distinct perturbation sequences in the density matrix picture (see, for example, [28,29] ae , where s 6 P x 6 iP y . The term r 10,10 in the upper sequence is not directly excited by the optical fields because of the polarization selection rules.…”

Rabi Oscillations of Excitons in Single Quantum Dots

“…A polarizer is then used to block the strong pump before the detector. As shown in [1], coupling between the fine structure states je x ͘ and je y ͘ through the common crystal ground state jg͘ can be understood in terms of the well-studied atomic three-level system [18]. This is because the binding energy of the biexciton state keeps the exciton to biexciton transition well detuned from the resonant ground state to exciton transition.…”