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Sub-wavelength Laser Nanopatterning using Droplet Lenses.

ABSTRACT: When 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.

SUBMITTER: Duocastella M

PROVIDER: S-EPMC4635425 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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Sub-wavelength Laser Nanopatterning using Droplet Lenses.

Duocastella Martí M Florian Camilo C Serra Pere P Diaspro Alberto A

Scientific reports 20151106

When 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 be ...[more]

PMID: 26541765

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