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Nowadays three-dimensional (3D) printing has been widely used for producinggeometrically complex 3D structures from a broad range of materials such asceramics, metals, polymers, semiconductors, etc. Although it has beendemonstrated that a fabrication resolution as high as ~100 nm can be achievedin 3D printing based on two photon polymerization (TPP), the end product sizeof TPP is typically on millimeter scale limited by the short working distanceof high-numerical-aperture focal lens. Here we present a method based onsimultaneous spatiotemporal focusing (SSTF) of the femtosecond laser pulsesthat enables to fabricate centimeter-scale 3D structures of fine features withTPP. We also demonstrate an isotropic spatial resolution which can becontinuously tuned in the range of ~10 um and ~40 um by only varying the powerof femtosecond laser, making this technique extremely flexible and easy toimplement. We fabricate several Chinese guardian lions of a maximum height of0.6 cm and a Terra Cotta Warrior of a height of 1.3 cm using this method.

Centimeter-scale superfine three-dimensional printing with femtosecond laser two-photon polymerization