We report the H band luminescence due to an indirect exciton composed of a two-dimensional electron and a hole in a modulation-doped GaAs/AlGaAs double heterostructure. The two-dimensional feature of the H band was clearly revealed by far-infrared optically detected cyclotron resonance in tilted magnetic fields. In addition, the Fermi-edge singularity was observed in the H band spectra and the characteristics of excitons have been confirmed by the magneto-oscillatory spectra.
Nakata, H., Saitoh, M., Fujii, K., & Ohyama, T. (2000). Photoluminescence of two-dimensional electron system excited by far-infrared cyclotron resonance in GaAs/AlGaAs double heterostructure. Journal of Luminescence, 87, 366–368. https://doi.org/10.1016/S0022-2313(99)00397-X