Femtosecond MicromachinningUltrashort pulses are ideal for micro-machiningUltrashort pulse lasers can precision machine many materialsM.D. Feit, A.M. Komashko, A.M. Rubenchik, Lawrence Livermore National Laboratory

Ultrashort-pulse micro-machining can make sub-wavelength holesBecause high-order nonlinear-optical processes are responsible for cutting, there is effectively a threshold for cutting. This means that careful control of the intensity can yield a very small hole

Long pulseShort pulse

Long- vs. short-pulse micromachiningThe main advantages of femtosecond micro machining are:-No thermal damage: High machining quality, heat sensitive material machining - Unmatched accuracy: Down to 100nm (very well defined ablation threshold)- No wavelength dependence: Any material can be machined with the same laser

Examples