The Indian Institute of Science (IISc) has achieved a groundbreaking milestone by fabricating a device capable of converting infrared light into visible light. This advance promises to revolutionize fields such as defense and optical communications by leveraging easily available visible-light cameras instead of traditional bulky infrared sensors.
In a significant first, the IISc researchers utilized a 2D material to design a non-linear optical mirror stack, achieving both up-conversion of infrared light and widefield imaging capabilities. The technology employs multilayered gallium selenide attached to a gold reflective surface with a silicon dioxide layer in between, simplifying existing complex infrared imaging approaches.
This culmination of research was led by Associate Professor Varun Raghunathan from the Department of Electrical Communication Engineering and his team, including PhD student Jyothsna K Manattayil. Their work, published in ‘Laser & Photonics Reviews,’ promises improved efficiency and reduced size, circumventing the limitations and export restrictions of conventional infrared sensors.
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