Quantization of excitonic polaritons in thin GaAs layers

Abstract
Reflectance, excitation, and luminescence spectra at energies near the 1s excitonic resonance of a thin (500 nm) GaAs-AlGaAs double heterostructure are reported. The reflectance data are analyzed by using a dielectric model. Excitation as well as luminescence spectra reveal the properties of discrete polariton states due to quantization.