Influence of Many-Body Interactions on the Excitonic Optical Stark Effect

Influence of light holes on the heavy-hole excitonic optical Stark effect

“…Here the differential spectra have been multiplied by the detuning ⌬ hh . As shown earlier 14 and derived analytically in the previous section, the Pauli-blocking contributions to the Stark shift scale with 1/⌬ hh and the first-order Coulomb correlations vanish like 1/⌬ hh 2 . The higher-order Coulomb correlations exhibit the strongest detuning-dependent decay proportional to 1/⌬ hh 3 .…”

Theory of Optically Nonlinear Effects in Ultrafast Spatio-Temporal Dynamics of Semiconductors

“…The situation for thin samples has widely been studied in the investigation of the optical Stark-effect, where the spectral response of the excitonic resonance to an off-resonant light field is investigated [12]. In general, off-resonant excitation yields to an adiabatic response of the semiconductor if the detuning Δ of carrier frequency and optical transitions is much larger than the inverse pulse width Δ » FWΗM-1 .…”

Coulomb correction to the dressed exciton in an inorganic-organic layered semiconductor: Detuning dependence of the Stark shift

“…Because shifts should be proportional to the inverse of the detuning for ϩ ϩ and xy in the model without B, the discrepancy represents the stronger dependence, i.e., ␦ ϩϩ,xy ϰ͉ p Ϫ X ͉ Ϫ␣ with ␣Ͼ1, although the value of ␣ cannot be determined accurately with our experimental resolution. Such strong dependence was theoretically derived as a result of the Coulomb interaction 8,12 or more concretely the exciton-exciton interaction, 10 but this has been suggested in only a few experiments. 11,16 Including B to the model, the numerical result gives a rather improved fit, as shown by the dashed curves in Fig.…”

“…Distinctive features in the excitonic system, all of which originate from the Coulomb interaction, have been pointed out, for instance, the excitonic enhancement, 5 the stronger detuning dependence, 8,10,11 and the oscillator strength change. 5,12,13 Predicted peculiarities, however, have been detected in only a few experiments. 11,14 -16 The excitonic redshift was observed, by the pump-probe spectroscopy, in the CuCl crystal 14 in the colinear configuration and in the InGaAs quantum well in the opposite-circular configuration.…”