Abstract
Effects of the space charge on the microlens formation in glasses using the electric-field-assisted ion exchange process have been analyzed by numerical methods. It is shown that the electric field strength in the substrate is inhomogeneously distributed and decreases with time. Since the field-assisted migration velocity depends on the field strength, these factors slow down the ion exchange rate and decrease the microlens diameter below the values calculated assuming a homogeneous field strength distribution in the substrate.
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