Using a new time-based method to control light from an ultrafast laser, researchers have developed a nanoscale 3D printing technique that can fabricate tiny structures a thousand times faster than conventional two-photon lithography (TPL) techniques, without sacrificing resolution.

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Despite the high throughput, the new parallelized technique — known as femtosecond projection TPL (FP-TPL) — produces depth resolution of 175 nanometers, which is better than established methods and can fabricate structures with 90-degree overhangs that can’t currently be made.

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The technique could lead to manufacturing-scale production of bioscaffolds, flexible electronics, electrochemical interfaces, micro-optics, mechanical and optical metamaterials, and other functional micro- and nanostructures. The work, reported in the journal Science ( “Scalable submicrometer additive manufacturing” ), was done by researchers from Lawrence Livermore National Laboratory (LLNL) and The Chinese University of Hong Kong.

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Sourabh Saha, the paper’s lead and corresponding author, is now an assistant professor […]

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