Dephasing of interacting heavy-hole and light-hole excitons in GaAs quantum wells

Mixed biexcitons in single quantum wells

“…The polarization dependence of the XX h BIF induced FWM is obtained by the solution of optical Bloch equations for a homogeneously broadened many-level system ͑see Fig. 3͒, in which the calculated Fourier transformed third-order polarization at ប h Ϫ⌬ h is proportional to the product of the polarizations of the involved transitions, 11 i.e.,…”

Slow dephasing and local field effects of exciton–biexciton transition in detected by femtosecond degenerate four-wave mixing

“…Instead, we consider that the observed FWM signals at 1.550 eV manifest themselves as the results of many-body correlation among the carriers in bÀZnP 2 . The many-body correlation effects, such as LFR, PSF and EID, are taken into account in the analysis of nonlinear optical response of semiconductors by using the semiconductor Bloch [7][8][9][10][11][12][13][14][15], the extended OBE for the multi-level scheme [18,19,34], and the theoretical approach on a microscopic basis [22,[35][36][37]. These theoretical calculations can explain the FWM signals observed for negative time delay in exciton and biexciton system.…”

Determination of the signal polarization state in four-wave mixing experiments on semiconductors

“…(Refs. [9][10][11][12]). The predictions of these modified OBE still significantly differ from the experimental observations.…”