'Anti-laser' built for first time
: The researchers chose the wavelength of the laser light so that light waves hitting the outside of the slab from the laser beams were in just the right phase with the waves transmitted through the material to trap the light inside the slab.
The silicon absorbed 99.4 per cent of near-infrared light with a wavelength of 998.5 nanometres, turning it into heat. "Theory and experiment matched very well," says Stone. "We couldn't have expected to do any better."
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