The new device, developed by researchers at the University of Warwick's engineering department, uses a combination of precise curvatures on the lens and a multilayered filter to achieve its goal.

Optical antennas are already available. But this new antenna is so precise, according to the researchers, that it can detect a signal on a single wavelength of light. The scientists, led by professor Roger Green, assert that the device is 100 times more efficient at gathering in a signal than any previous optical sensor of this kind.

"It's got particular strategic advantages in areas where you want to send large amounts of information quickly or want greater security with lower chances of eavesdropping," Green said.

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