The one‐ and two‐photon absorption due to surface state excitons
A. I. Bobrysheva, S. I. Beryl, V. T. Zyukov, S. A. Moskalenko, E. P. Pokatylov · physica status solidi (b) · 1983
Abstract The oscillator strengths are calculated for one‐ and two‐photon absorption by surface state Wannier excitons. The model of two surface bands is used, and excitons and electron‐hole pairs act as intermediate states. The cases of direct allowed and forbidden dipole transitions are investigated. Numerical calculations of the ratios of two‐ and one‐photon oscillator strengths are performed for (100) GaAs.