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The trick could reduce the carbon emissions and energy usage associated with recycling paper.
Metamaterials that convert lower-energy photons to usable wavelengths could offer solar cells an efficiency boost.
The new type of sensor could be an early warning system for bridges and buildings under stress.
Researchers learn how to make lasers directly on microchips—the result could be computers that download large files much more quickly.
An experimental type of laser could lead to faster communications.
A thin layer of glass makes “sub-wavelength” lasers more practical.
Tiny chemical probes implanted into patients could identify proteins in trace quantities.