Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers ...
To unlock materials of the future, including better photocatalysts or light-switchable superconductors, researchers need to understand how the valence electrons within materials respond to light at ...
How matter responds to light lies at the core of vision, photosynthesis, solar cells, and many other fields of scientific and practical import. But until now, it hasn't been possible to see just how ...
Particles in the atmosphere affect global climate. For example, the black carbon from burning fossil fuels absorbs and radiates light and heat. To calculate the effects of aerosols on climate, ...
In a paper published Aug. 30 in Nature, an international team of researchers working at the Linac Coherent Light Source at SLAC National Accelerator Laboratory describe a promising new method that ...
The terahertz segment of the electromagnetic spectrum exists in a sort of “twilight zone” between about 300 GHz (0.3 THz) to 3 THz (note that the upper boundary value is somewhat arbitrary, and some ...
Cavity quantum electrodynamics has been intensively studied in recent years 1,2,3,4, owing to the important applications in quantum optics and nonlinear optics. When a two-level atom is placed inside ...
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