Making color: When two red photons make a blue photon

Can scientists generate any color of light? The answer is not really, but the invention of the laser in 1960 opened new doors for this endeavor. Scientists have now demonstrated a new semiconductor microstructure that performs frequency conversion. This design is a factor of 1000 smaller than previous devices.

Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/G...