Characteristics of the distribution of electromagnetic radiation in a surface layer of cadmium sulfide subjected to combined electron and optical annealing

An investigation is reported of the propagation of electromagnetic radiation in a layer-periodic structure formed in a disturbed surface layer of cadmium sulfide subjected to electron and optical annealing. This structure has a period of d₀ = λ / 2n₁ and is due to annealing of the disturbed material (during the first pulse) in the vicinity of the intensity maxima in an interference pattern and also due to the difference between the refractive indices of the disordered phase n₁ and the "perfect" material n₀. The intensity maxima in a layer-periodic structure are located outside the regions annealed during the first pulse. This increases the volume of the annealed regions from one pulse to the next. Annealing of the whole disturbed layer can be achieved simply by displacement of the recrystallization front by ~ d₀, since the displacement should occur in each of the periods. The structure period d₀ is close to that at which the nontransmission effect is observed. This leads to anomalies of the distribution of the intensity I(x) in the structure. A quasiperiodicity is exhibited by I(x) and the quasiperiod is considerably greater than d₀, whereas the intensity at the maximum may be considerably greater than the intensity of the incident wave, which enhances the effectiveness of annealing of the internal regions.