EN
Photovoltaic magneto-spectroscopy was used for the first time as the interband probe in the study of the 2D electron gas on narrow-gap HgCdMnTe semiconductor. The strong circular dichroism was found which agrees with the phenomenological description of the optical properties of the 2D electron systems in quantized Hall regime. The model of coupled intersubband resonances and interband transitions was proposed as a qualitative explanation.