Physicists Pack 11 Optical Functions Into One Ultra-Thin Surface by Embracing — Not Fighting — Disorder

A team of physicists at Monash University in Melbourne, Australia, has developed an ultra-thin optical device that packs eleven distinct light-manipulating functions into a single surface — by doing something that would have seemed counterintuitive to most engineers: deliberately introducing disorder.

The research, published April 10, 2026, in Nature Communications, describes what the team calls "disordered mosaic metasurfaces" — nanostructured materials in which individual optical units, called meta-pixels, are scattered in apparently random arrangements rather than the perfectly ordered patterns that most optical device design has relied upon. The result, the team found, is a material that can simultaneously perform more optical tasks than any equivalently sized device with a conventional ordered structure.

Lead researchers Dr. Chi Li and Dr. Haoran Ren from the Monash University School of Physics and Astronomy collaborated with Dr. Changxu Liu at the University of Exeter, Professor Stefan Maier, and Professor Andrew Forbes at the University of the Witwatersrand in South Africa. Their work addresses a fundamental challenge in optical engineering: how to build compact devices capable of handling the complex, multiplexed demands of modern sensing, imaging, and communication systems.

"Disorder is usually something engineers try to eliminate," said Dr. Ren. "But we found that if you design it carefully, disorder can actually enhance what these devices can do. It gives you degrees of freedom you simply don't have in a perfectly ordered system."

Among the eleven functions packed into the new device is broadband achromatic lensing — the ability to focus light across a wide range of colors without the chromatic aberration that causes ordinary lenses to distort images differently at different wavelengths. This is a notoriously difficult problem in optics, and current solutions typically require complex, multi-element lens systems. The Monash team achieved it in a single flat layer of engineered nanomaterial.

The device also enables single-measurement polarization imaging, which can reveal structural information about materials invisible to conventional cameras. Polarization-sensitive imaging has broad applications in biomedical diagnostics — where it can detect cancerous tissue — as well as in industrial inspection, environmental remote sensing, and materials science.

Dr. Li offered an analogy to explain how the disordered design achieves what ordered designs cannot. "Think of it like a city," she said. "Traditional designs give one function the entire space. What we've done is redesign the 'urban planning' so multiple functions can coexist efficiently. Different functions don't compete for the same real estate — they coexist within the same disordered landscape."

Metasurfaces are part of a broader class of materials called metamaterials — artificially engineered structures with properties not found in naturally occurring substances. By controlling the size, shape, spacing, and orientation of nanoscale features at the subwavelength scale, researchers can engineer how light interacts with the surface in extraordinary ways. The Monash team's innovation lies in recognizing that the strict geometric order typically imposed on such structures is not necessary, and may in fact be limiting.

The implications extend across multiple industries. In telecommunications, compact multifunctional optical surfaces could reduce the size and cost of signal processing hardware in fiber-optic networks. In space-based imaging, they could enable satellite instruments to perform multiple spectroscopic tasks simultaneously without increasing weight or complexity — a critical consideration for space missions. In medicine, they could lead to smaller, lighter diagnostic imaging tools with capabilities currently achievable only by bulky multi-lens setups.

The research team said next steps include scaling the fabrication process to produce larger metasurface panels, validating the eleven-function devices under real-world operating conditions, and exploring whether even greater functional density is achievable by tuning the degree of disorder in more sophisticated ways.