Photoluminescence of CdTe/CdMgTe Double Quantum Wells with a Two-Dimensional Electron Gas

Abstract

Magnetophotoluminescence measurements at liquid helium temperatures were carried out on asymmetric double quantum wells based on CdTe/CdMgTe heterostructures. Due to doping with shallow iodine donors, a twodimensional electron gas was present in the quantum wells. The samples studied differed with the quantum well widths and doping level. We show a resemblance of the luminescence to results obtained on single quantum wells which suggests that in samples studied the quantum wells are not strongly coupled.

Optical properties of heterostructure CdTe/CdMgTe doped in various ways

“…The CdTe/Cd 1−x Mg x Te heterostructures are a subject of numerous research activities (see, for example [1][2][3][4][5]), because a cadmium substitution by magnesium insignificantly changes a lattice parameter and thus make it possible to grow a high quality interfaces. In this study we have investigated reflection and luminescence spectra of a series of CdTe/Cd 1−x Mg x Te heterostructures doped by different methods which contain a single CdTe quantum well (QW) of 100 nm thickness.…”