Glasses-Free Display Switches Between 2D and 3D Using Nanostructured Metasurface Lens Technology

Samsung Electronics and Pohang University of Science and Technology (POSTECH) have jointly developed a glasses-free display technology that can switch between 2D and 3D modes using a single nanostructured lens, as reported in the journal Nature on April 22, 2026.

The innovation centers on a metasurface lenticular lens (MLL), an ultra-thin optical device composed of nanoscale structures that dynamically adjusts its focal properties through voltage-controlled polarization. This allows the display to seamlessly transition between high-resolution 2D imaging and stereoscopic 3D viewing without requiring users to wear special glasses or use eye-tracking systems.

Conventional glasses-free 3D displays, typically based on lenticular lenses, have been limited by narrow viewing angles—often around 15 degrees—and reduced resolution when displaying 2D content, which remains essential for commercial applications. The new metasurface-based approach overcomes these constraints by enabling wide-angle 3D viewing while maintaining high-resolution 2D performance in a single, thin device.

The research team, led by Professor Jun-seok Rho from POSTECH’s Departments of Mechanical, Chemical, and Electrical Engineering and the Graduate School of Convergence Science and Technology, collaborated with Samsung Research’s Visual Technology Team to design and demonstrate the switchable metalens display. Their work was published in Nature under the title “Switchable 2D-3D display through a metasurface lenticular lens.”

A metasurface is a flat optical component hundreds of times thinner than traditional lenses, capable of precisely controlling light properties such as phase, amplitude, and polarization at the nanometer scale. By leveraging polarization control, the MLL can direct light to each eye to create a glasses-free 3D effect that mimics natural depth perception, while switching to a flat, high-fidelity 2D mode when needed.

The technology advances the concept of light field displays, which present different images based on viewing angle to create 3D experiences. Earlier versions faced commercialization challenges due to bulky optics, narrow viewing angles, reduced resolution, and reliance on real-time eye tracking. The new design eliminates the need for eye tracking by using polarization to switch modes electronically, improving usability and scalability.

According to the joint announcement from Samsung and POSTECH on April 23, 2026, the development follows prior progress in mass-producing metalenses and represents a significant step toward practical applications in consumer electronics, augmented reality, medical imaging, and education. The Ministry of Science and ICT in South Korea confirmed the achievement and noted that the research is being considered for major scientific recognition.

Analysis of the research indicates that the metalens-based display maintains optical efficiency and image quality across both modes, addressing a key limitation of previous switchable systems that often sacrificed performance in one mode to enable the other. The ability to freely switch between 2D and 3D without glasses or external tracking could enable more versatile displays for smartphones, tablets, and large-format screens.

While the current demonstration remains at the research stage, the team emphasizes that the metasurface lens is compatible with existing display manufacturing processes, suggesting a viable path toward integration into future consumer devices. No specific timelines for commercial product release were disclosed in the published research or accompanying statements.

As display technology continues to evolve beyond traditional stereoscopic and lenticular approaches, this development represents a notable advancement in meta-optics—applying nanoscale engineering to control light in ultra-thin formats. The success of the switchable MLL highlights the growing role of metalenses in next-generation optical systems, particularly where thinness, multifunctionality, and precise light control are critical.