Microfabrication of Three-Dimensional Structures in Polymer and Glass by   Femtosecond Pulses
  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). 
Saulius Juodkazis, Toshiaki Kondo, Vygantas Mizeikis, Shigeki Matsuo,   Hiroaki Misawa, Egidijus Vanagas, Igor Kudryashov