Inelastic Light Scattering from Landau-Level Electrons in Semiconductors

Inelastic scattering of 10.6-μ C${\mathrm{O}}_2$ laser radiation by mobile electrons in a magnetic field has been observed in $n$-InSb. Spectra of the scattered light reveal three distinct lines corresponding to electron spin flip and to transitions with $\Delta l=1\mathrm{}$ and $\Delta l=2\mathrm{}$, where $l$ is the Landau-level quantum number. Observations are compared with theoretical predictions and electronic parameters obtainable from the spectra are discussed.