University of Melbourne Develops Metasurface Optical Screen Converting Infrared to Visible Light with 1000x Brightness, Paving Way for Cheaper Infrared Cameras

September 20, 2026

EurekAlert! Australia

Overview

Researchers led by the University of Melbourne have developed an optical screen, or ‘metasurface,’ covered in tiny rare-earth nanoparticles that directly converts invisible infrared light into visible light, making the converted image over 1000 times brighter. This innovative technology could lead to smaller, lighter, and more affordable infrared imaging systems for applications such as night vision, remote sensing, and biomedical imaging. This is expected to significantly expand the applicability of infrared technology, providing high-performance, low-cost solutions across various fields.

In Depth

Key Findings

A research team led by the University of Melbourne has developed a unique ‘metasurface optical screen’ incorporating tiny rare-earth nanoparticles. This screen possesses the remarkable ability to directly convert invisible infrared light into visible light with high efficiency, resulting in a converted image that is over 1000 times brighter than achievable with existing technologies. This breakthrough eliminates the need for expensive and bulky traditional infrared detectors, thereby significantly contributing to the realization of smaller, lighter, and more affordable next-generation infrared cameras.

Technical Details

The developed metasurface is an artificial nanostructure meticulously designed to interact with specific wavelengths of light. Its surface is precisely patterned with nanoparticles utilizing rare-earth elements (e.g., erbium, ytterbium). These nanoparticles absorb energy from infrared light, which excites their electrons. These electrons then transition to higher energy levels before emitting visible light (upconversion). This process has been optimized to occur with exceptionally high quantum efficiency, resulting in an extremely bright converted visible light image. The screen’s structure itself is also engineered to maximize light scattering and absorption.

Background and Industry Context

Infrared cameras are indispensable tools in diverse fields such as night vision, thermal imaging, medical diagnostics, and industrial monitoring. However, current infrared cameras rely on high-performance semiconductor detectors that often require cooling, making them expensive, bulky, and power-intensive. Consequently, their widespread adoption has been limited. This new metasurface technology has the potential to overcome these cost and size barriers by eliminating the need for conventional detectors, thereby democratizing infrared imaging technology.

Strategic Significance and Outlook

This novel metasurface optical screen is expected to find broad applications in consumer and industrial sectors, including night vision systems, automotive safety features, surveillance cameras, remote sensing (environmental monitoring, agriculture), and even integrated infrared cameras for smartphones. In the medical field, it could contribute to lowering the cost of non-invasive diagnostic tools. The research team will focus on optimizing the manufacturing process for mass production and expanding the capability to cover different spectral bands. This technology is poised to transform infrared imaging, making it more accessible and widely usable, thereby becoming a key enabler for numerous new applications beyond specialized fields.

Source: https://www.eurekalert.org/news-releases/1144136

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