Solar cells offer the opportunity to harvest abundant, renewable energy. Although the highest energy light occurs in the ultraviolet and visible spectrum, most solar energy is in the infrared. There is a trade-off in harvesting this light, so that solar cells are efficient in the infrared but waste much of the energy available from the more energetic photons in the visible part of the spectrum.
Almost 80 years after Einstein referred to quantum entanglement as ‘spooky action at a distance’, scientists have found a new form of entanglement involving three particles instead of just two.
Physicists say that, for the first time, they've created an elementary quantum network based on interfaces between single atoms and photons.
A new photon-based optical network being researched by the U.S. government could potentially deliver huge amounts of data and images much faster than current optical networks.