Optical Properties of ZnCdSe/ZnMgSe Multiple Quantum Wells Grown by Molecular Beam Epitaxy

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（8）
• 页码范围: 1152-1154
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

We study the optical properties of ZnCdSe/ZnMgSe multiple quantum wells using photoluminescence (PL) and Raman scattering spectra. In the PL spectra, an intense emission band coming from the free exciton luminescence of the quantum wells can be observed from 80 K to 300K. The exciton binding energy is evaluated by the dependence of PL intensity on the temperature, showing the behaviour of the better two-dimensional excitons.The result indicates that the enhancement of the confinement effect is due to containing Mg in the barrier layers.At room temperature, Paman scattering spectra are classified into confined optical modes and folded optical modes. This confirms the formation ofa multilayer system with a higher crystalline quality.