An anti-laser can make objects absorb 98 per cent of the light that hits them. The technology could be used to collect faint light from distant stars or to charge drones in flight with lasers
at Vienna University of Technology in Austria, light enters the device then gets stuck in an inescapable series of bounces within it.The researchers achieved this by directing red light through a metre-long maze of carefully arranged lenses, mirrors and one piece of tinted glass. The glass was the intended light absorber. Light reflected off the mirrors and interacted with images of itself created by the lenses in such a way that it got redirected every time it came close to exiting the device.
Before it was inserted in the device, the glass could absorb 15 per cent of light. The whole device, in contrast, absorbed about 98 per cent of the light that entered it, effectively increasing light absorption of the glass more than six-fold.at Pennsylvania State University says that, previously, similar devices perfectly absorbed only specific light wave shapes and only when they were illuminated at particular angles.
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