Magnetic-Field—Induced Resonance in Raman Scattering from CdS

We have observed magnetic-field—induced resonance in Raman-scattering cross sections. The resonance enhancement for 1LO scattering from CdS, obtained with 4765 Å, is a factor of ∼30 at 90 kG. The results are interpreted in terms of resonance of the incident photon with the Landau levels of the ${\Gamma }_7$ conduction and valence bands. With a 4579-Å laser, we see a resonance of the Stokes 3LO process. We explain this as the resonance of the scattered photon.