Duke University engineers have developed a novel “sensor” that is more efficient, versatile, and cheaper for potential use in such applications as security scanners and collision avoidance systems for aircraft, automobiles, or maritime vessels.

The researchers fabricated a unique material known as a “metamaterial” that acts as a “lens” to image scenes using fewer components than conventional detectors. Due to this man-made material’s properties, much of the additional equipment needed for conventional detector systems (e.g., lenses, mechanical positioners, and data-storage or transmission devices) are not required.

The material itself is a thin laminate with row upon row of tiny squares etched onto copper; each one is tuned to a different light frequency. The material is flexible and durable enough to be attached to a wall, wrapped around corners, or even laid on the floor like a rug, making it an inexpensive alternative for a variety of sensing applications.

The new system works with microwave light and produces 2D images. The researchers are currently exploring moving the technology to 3D capability in real-world settings.

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