Abstract
Two photon Raman scattering (TPRS) via virtually excited biexcitons is observed in CdS over a rather large spectral region in a scattering configuration which favours stimulated emission. We observe either a pure longitudinal exciton or-for the first time—a bound exciton (I 2) as final state particles. Furthermore, the anomaly in the relation between ħωexc and ħωR at ħωexc=\(\tfrac{1}{2}\)ħ Eblex is observed for the first time in a II–VI compound, indicating an energy of the Γ1 biexciton level of 5.098 eV in agreement with two photon absorption measurements. With an applied magnetic fieldB, the corresponding shift of the exciton eigenenergies can be observed. For the longitudinal\(A_{\Gamma _5 } \) exciton, the diamagnetic shift is 0.35 meV atB=10T forB⊥c in agreement with theoretical predictions. In this configuration also a stimulated one photon spin flip Raman scattering is observed, yielding the well known electronicg-value of 1.78.
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Kurtze, G., Maier, W., Blattner, G. et al. Some results on electronic two- and one photon raman scattering in CdS. Z. Physik B - Condensed Matter 39, 95–98 (1980). https://doi.org/10.1007/BF01301513
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DOI: https://doi.org/10.1007/BF01301513