ABSTRACT
This chapter describes some of the typical magneto-optical experiments. It discusses the effect of magnetic field on the polaron energy and then presents some of the experiments that provided the evidence for the existence of the polaronic effect. The chapter examines the effect of a weak magnetic field on the polaron energy. Both the doublet and the observed variation with the field of the intensity and energy of each component lend strong support to the polaronic effect in InSb, for in the normal theory of interband magneto-absorption, one does not expect such a behavior. Polaron Zeeman effect is another example of the experimental verification of the Frohlich theory. When the hydrogenic excited level in zero magnetic field lies one LO-phonon energy above the ground state energy, the pinning effect partially suppresses its Zeeman splitting in a magnetic field. Lindemann et al. have studied the polaron phenomena in GaAs by the cyclotron resonance experiments under hot electron conditions.
