Effect of Electrode Reversal on Induced Nonlinearity in Specialized Silicon Structures

This research analyzes the properties of the nonlinearity profile that emerge in specialized silicon glass due to alterations in the poling conditions. The alterations are introduced in two steps. First, a set of two identical samples are poled with a positive voltage, but one of the samples is oriented in the opposite orientation inside the poling setup. One can alternatively think of this as a reversal of the electrodes. Next, another identical set of samples is poled in the same manner, but with a negative poling voltage. Thus, four glass samples are produced that possess unique nonlinearity profiles. The samples are analyzed for the second harmonic generated power, input pump power dependence, room temperature aging, effect of a different dopant type and most importantly, widths and locations of the nonlinear regions. A MATLAB simulation model is used to propose a hypothesis regarding the nonlinearity profiles of these glass structures.