Trion, biexciton, and exciton dynamics in single self-assembled CdSe quantum dots

Statistics of excitons in quantum dots and their effect on the optical emission spectra of microcavities

“…Already at the next higher excitation-with one more electron, hole or electron-hole pair added to the first exciton-the situation offers rich and various phenomena both in weak 18,19 and strong 20 coupling, owing to the underlying complexity of the excitonic states. In this work we shall be concerned with resonant optical pumping, so that excitations are created in pairs and the system always remains electrically neutral.…”

“…The minus sign in (28) results from the Pauli principle: two fermions (electrons and holes) cannot occupy the same state. Assuming ϕ(r e , r h ) is normalised, N 1 = 1, so according to (19),…”

Lifetime and polarization of the radiative decay of excitons, biexcitons, and trions in CdSe nanocrystal quantum dots

“…A signature of the radiative decay of XX has only recently been observed [4] as a low energy shoulder of the monoexciton PL peak using time-resolved, femtosecond PL measurements. The situation is different for CdSe/ZnSe self-assembled quantum dots, where, due to a less efficient non-radiative (Auger) recombination mechanism, the lifetimes for the radiative decay of X, X -and XX have been measured [5]. The ratio between exciton and biexciton radiative lifetime was found to be [5] τ(X):τ(XX) ~ 2:1.…”

Progress in the optical studies of single InGaN/GaN quantum dots

“…However, this seemingly intuitive picture neglects the interactions between the carriers. Indeed, such measurements, which have been made on several QD structures such as CdSe/ZnSe [44,45] and InGaAs QDs [46][47][48][49], revealed a ratio between the biexciton and the exciton recombination rates XX / X varying between 0.33 and 2.…”