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- W3046138556 abstract "Abstract Engineering material properties is key for development of smart materials and next generation nanodevices. This requires nanoscale spatial precision and control to fabricate structures/defects. Lithographic techniques are widely used for nanostructuring in which a geometric pattern on a mask is transferred to a resist by photons or charged particles and subsequently engraved on the substrate. However, direct mask-less fabrication has only been possible with electron and ion beams. That is because light has an inherent disadvantage; the diffraction limit makes it difficult to interact with matter on dimensions smaller than the wavelength of light. Here we demonstrate spatially controlled formation of nanocones on a silicon surface with a positional precision of 50 nm using femtosecond laser ablation comprising a superposition of optical vector vortex and Gaussian beams. Such control and precision opens new opportunities for nano-printing of materials using techniques such as laser-induced forward transfer and in general broadens the scope of laser processing of materials." @default.
- W3046138556 created "2020-08-03" @default.
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- W3046138556 date "2020-07-28" @default.
- W3046138556 modified "2023-10-02" @default.
- W3046138556 title "Spatially controlled nano-structuring of silicon with femtosecond vortex pulses" @default.
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- W3046138556 doi "https://doi.org/10.1038/s41598-020-69390-4" @default.
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