Abstract
A new method to enhance the output efficiency of the multi-frequency second harmonic generation process has been presented in the one-dimensional aperiodic optical superlattice by sandwiching linear layers between nonlinear media. The linear and nonlinear domain arrangements of aperiodic crystal are designed using the simulated annealing optimization method. The dependence of the output efficiency of second harmonic generation on the linear length has been investigated in detail; the most optimized structure being suggested. A comparison between pure nonlinear and linear–nonlinear layered structures is presented which shows an increasing amount of the output efficiency in the presence of linear layers for the nonlinear aperiodic crystals.
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