Study of the Effects of Size Quantization in Coupled Al_xGa_(1-x)As/GaAs/Al_xGa_(1-x)As Quantum Wells by Means of Photoreflectance Spectroscopy

摘要

Photoreflectance spectral are measured in heterostructures with coupled quantum wells at room temperature. The energies of the optical transitions are determined, and their variation with the well width and barrier thickness is studied. The experimental results are compared with the theoretically calculated electron-hole transition energies. Good agreement is obtained for narrow wells.