Two-photon magnetoabsorption of ZnTe, CdTe, and GaAs

Two-photon magnetoabsorption measurements of 2P excitons in ZnTe, CdTe, and GaAs are presented. The measurements are carried out in Faraday (k∥B) and Voigt (k⊥B) configuration in fields up to 7 T. Besides a Zeeman splitting and a diamagnetic shift, a drastic enhancement of the two-photon oscillator strength is detected. This enhancement is due to the magnetic-field-induced compression of the wave function. The energies and the wave functions are calculated with use of an effective-mass Hamiltonian which includes the degeneracy of the valence band. From a fit of the calculated eigenvalues to the experimental results all relevant mass parameters and g values ($m_e^{\mathrm{*}}$, ${\gamma }_1$, ${\gamma }_2$, ${\gamma }_3$, $g_c$, κ, q) are deduced. The large number of magnetic components allows a consistent and precise determination of all relevant parameters.