Exciton-polaritons in InP: Magnetoreflectance investigation

Abstract

The fine-structure parameters of the free exciton in InP are determined from low-, intermediate-, and high-field magnetoreflectance investigations. First, a reconsideration of the linear Zeeman splitting at the low-field limit allowed us to obtain the g factors of the conduction electron and of the valence-band hole. Second, taking into account both the field and the wave-vector dependences of the exciton levels, a systematic calculation of the reflectance spectra has been performed for a wide range of field. After a close comparison between the experimental data and that calculation, we obtained the following set of valence-band parameters: ${\gamma }_1$=5.22, ${\gamma }_2$=1.83, ${\gamma }_3$=2.34, and κ=0.89. For the g factor of the electron, we found $g_c$=1.23.