  We report three-dimensional laser microfabrication, which enables
microstructuring of materials on the scale of 0.2-1 micrometers. The two
different types of microfabrication demonstrated and discussed in this work are
based on holographic recording, and light-induced damage in transparent
dielectric materials. Both techniques use nonlinear optical excitation of
materials by ultrashort laser pulses (duration < 1 ps).
