A light activated optical switch includes at least one conductive layer
located adjacent to a piezoelectric element to enhance the electrical
field that is applied to the piezoelectric element in response to an
activation light. The conductive layer has free electrons or electron
holes that collect on a surface adjacent to the piezoelectric element
when the activation light is applied to the piezoelectric element. The
collection of free electrons near the piezoelectric element enhances the
electrical field that is applied to the piezoelectric element in response
to the activation light. The enhanced electrical field is used to enhance
the performance of the piezoelectric element and ultimately to enhance
the performance of the optical switch.