Nanoscale Printing of Indium-Tin-Oxide by Femtosecond Laser Pulses

Autor: Jingwen Hu, Zhen-Ze Li, Yang-Yang Zhao, Yi-Shi Xu, Lin Wang, Molong Han, Lachlan Hyde, Soon Hock Ng, Lei Wang, Saulius Juodkazis
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Nanomaterials, Vol 12, Iss 22, p 4092 (2022)
Druh dokumentu: article
ISSN: 2079-4991
DOI: 10.3390/nano12224092
Popis: For constructing optical and electrical micro-devices, the deposition/printing of materials with sub-1 μm precision and size (cross-section) is required. Crystalline c-ITO (indium tin oxide) nanostructures were patterned on glass with sufficient precision to form 20–50 nm gaps between individual disks or lines of ∼250 nm diameter or width. The absorbed energy density [J/cm3] followed a second-order dependence on pulse energy. This facilitated high-resolution and precise nanoscale laser-writing at a laser wavelength of 515 nm. Patterns for optical elements such as circular gratings and micro-disks were laser-printed using ITO as a resist. Unexposed amorphous a-ITO was chemically removed in aqueous 1% vol. HF solution. This use of a-ITO as a solid resist holds promise for metamaterial and micro-optical applications.
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