Duocastella, MartíFlorian Baron, CamiloSerra Coromina, PereDiaspro, Alberto2016-09-092016-09-0920152045-2322https://hdl.handle.net/2445/101709When a drop of liquid falls onto a screen, e.g. a cell phone, the pixels lying underneath appear magnified. This lensing effect is a combination of the curvature and refractive index of the liquid droplet. Here, the spontaneous formation of such lenses is exploited to overcome the diffraction limit of a conventional laser direct-writing system. In particular, micro-droplets are first laser-printed at user-defined locations on a surface and they are later used as lenses to focus the same laser beam. Under conditions described herein, nanopatterns can be obtained with a reduction in spot size primarily limited by the refractive index of the liquid. This all-optics approach is demonstrated by writing arbitrary patterns with a feature size around 280 nm, about one fourth of the processing wavelength.9 p.application/pdfengcc-by-nc-nd (c) Duocastella, M. et al., 2015http://creativecommons.org/licenses/by-nc-nd/3.0/esLàsersÒpticaLasersOpticsinfo:eu-repo/semantics/article6559442016-09-09info:eu-repo/semantics/openAccess26541765