A circularly polarized magneto-photoluminescence (magneto-PL) technique has been applied to investigate the Zeeman effect in InAs/InGaAs/InAlAs quantum wells (QWs) in the Faraday geometry. Structures with different thicknesses of the QW barriers have been studied in the magnetic field parallel and tilted with respect to the sample normal. The effective electron-hole g-factor has been found by measurement of splitting of polarized magneto-PL lines. Landé factors of electrons have been calculated using the 14-band method, and the g-factor of holes was determined by subtracting the calculated contribution of the electrons from the effective electron-hole g-factor. Anisotropy of the hole g-factor has been studied applying the tilted magnetic field.
We note that while being small in our samples with low electron concentration, the effects of many-body interactions on the electron g-factor cannot be completely excluded.38