Skip to ContentSkip to Navigation
Part of University of Groningen
Science LinX Science Linx News

These paintings show the future of optoelectronics

10 October 2023
Starry Night by Vincent van Gogh, and Girl with the pear earring by Johannes Vermeer | Wikimedia

Scientists at the Zernike Institute for Advanced Materials, University of Groningen, have just reproduced two famous paintings at the micrometre scale. This wasn’t just a homage to Dutch masters Johannes Vermeer and Vincent van Gogh, but a proof of principle in manufacturing minute optical systems.

FSE Science Newsroom | René Fransen

The canvas for these reproductions was formed by a layer of reflecting gold. On top of that, scientists led by professor of Nanostructured Materials and Interfaces Bart Kooi deposited a thin film of Sb2Se3 (antimony-selenium). Light-reflecting off the gold and passing through the film then takes on different colours, depending on the thickness of the film – just like a drop of oil on water will produce colourful reflections.

Images of Girl with a Pear Earring, in greyscale and true colours created by hight-differences in a thin film
The painting ‘Girl with a Pearl Earring’ by Johannes Vermeer was first transformed into a grey scale image, which was then reproduced on a micrometre scale by a novel ion milling approach, creating nanometer-scale height differences. The left panel shows a scanning electron microscopy (SEM) image. The middle panel shows true structural colours due to height variations created in the amorphous top film. The right image shows true colours after the film was crystallized. | Images Bart Kooi lab, University of Groningen


The pictures were first transformed into a greyscale image. An ion beam was then calibrated to mill the thin film to a depth that corresponded to the greyscale with nanometre precision. Light that is reflected through the thin film takes on a colour that depends on the local thickness of that film, resulting in a real colour image of the ‘Girl with a Pearl Earring’ by Vermeer (and also van Gogh’s Starry Night, not shown here).

This miniature art was created as a proof of principle, to show that ion beam milling can create nanometre-scale pixels with continuous height differences, something that isn’t possible when using traditional techniques like lithography. As the Sb2Se3 thin film is a phase-change material, it is also possible to change the properties of the pixels by switching their structure using electric pulses.

These tiny pixels could perhaps one day be used in displays, but will more likely be applied to create optical chips and other applications in optoelectronics.

The research was published in the journal Advanced Materials on 1 September.

Last modified:09 November 2023 4.02 p.m.
View this page in: Nederlands

More news

  • 13 May 2024

    Trapping molecules

    In his laboratory, physicist Steven Hoekstra is building an experimental set-up made of two parts: one that produces barium fluoride molecules, and a second part that traps the molecules and brings them to an almost complete standstill so they can...

  • 29 April 2024

    Tactile sensors

    Every two weeks, UG Makers puts the spotlight on a researcher who has created something tangible, ranging from homemade measuring equipment for academic research to small or larger products that can change our daily lives. That is how UG...

  • 16 April 2024

    UG signs Barcelona Declaration on Open Research Information

    In a significant stride toward advancing responsible research assessment and open science, the University of Groningen has officially signed the Barcelona Declaration on Open Research Information.