New pixel could turn screens into cameras.
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The future of screens may be far more interesting than simply increasing brightness or resolution. In a report by... Gizmodo, a study published in Nature showed that researchers from ETH Zurich They created a new type of pixel capable of emit and detect light at the same time.In practice, this paves the way for panels that, in the future, could function as both a screen and a camera in the same device, in addition to aiding in applications such as... holography, Augmented Reality and optical communication.
What changes with the so-called Fourier pixel?
Traditional pixels only do part of the job: they either emit light, as in a screen, or detect light, as in a camera sensor. The new concept presented by the researchers attempts to combine these two functions in the same element. Therefore, the group describes what they call a pixel. Fourier pixel as a component capable of controlling and sensing complete light fields, including amplitude, phase e polarization.
This difference matters because light carries much more information than just brightness. When a device can manipulate and read these other parameters, it starts working with a much larger volume of optical data, something that can be useful in smarter interfaces, more compact sensors, and new image formats.
How technology works
The work starts from wavy microstructures designed using principles of Fourier optics and... surface plasmon waves, waves that propagate over metallic surfaces. The combination allows these structures to be transformed into miniaturized diffractive elements, capable of generating very specific optical patterns and also of analyzing the received light.
In the official abstract of the article, the authors state that this architecture creates a scalable platform for programmable pixels at the vector level. Instead of working only with light intensity, the system acts on different characteristics of the electromagnetic wave, which greatly expands the type of information that the pixel can process.
Possible applications
The most promising applications are still in the research phase, but they already indicate a clear path. The article cites uses in adaptive optics, holographic displays, Augmented Reality, optical communication and even quantum information processingIn a more ambitious scenario, this advancement could also help create screens that display images and, at the same time, understand how ambient or user light interacts with them.
This is where the idea of a panel that also functions as a camera comes from. Instead of separating the display from the sensor, the proposal is to concentrate light emission and reading on the same surface. If this matures in the coming years, the industry may gain more freedom to develop devices with fewer cutouts, fewer visible modules, and new forms of visual interaction.
“A Fourier pixel expands the functionality of conventional pixels by exploring surface waves that interact with a precisely drawn wavy microstructure,” Yannik Glauser and Sander Vonk explained to Gizmodo.
Next Steps
Despite its potential, the technology is still in its early stages. The team itself acknowledges that, for now, it has only managed to produce... small arrangements of these pixels in the laboratory. In other words: the idea of a complete display-camera is still more of a long-term prospect than a product ready for laptops, smartphones or TVs.
Even so, the advance is significant because it shows that the pixel can evolve beyond the traditional role of turning light points on and off. If large-scale manufacturing truly becomes viable, future leaps in screens may come less from the number of pixels and more from the number of functions each pixel can perform.
