Plasmonics technology has the potential to revolutionize laser printing, according to researchers at the Technical University of Denmark (DTU). They say the technology can be used to create a laser printer capable of producing images with 120,000 dots-per-inch resolution.
Using plasmonic nanostructures in place of dyes, the DTU team reproduced a color image of Mona Lisa in a space smaller than the footprint taken up by a single pixel on an iPhone Retina display. The researchers report laser post-writing could make the process far more scalable.
The process involves aiming a laser pulse at each column of a nanoscale structure; the intensity of the laser pulse determines the level of deformation, and consequently the colors the column reflects. The researchers say the technology could have useful applications where there is a need to present images that are undetectable to the naked eye, such as the bar codes of products. Moreover, the technology could be used to label products in a unique way, making it difficult to commit fraud and forgery.
From IEEE Spectrum
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