It's Not an Illusion
Transforming Infrared into Visible Light
Nils W. Rosemann
Nils Wilhelm Rosemann and colleagues designed their compound of tin and sulfur, and with a diamondoid-like structure, then coating this scaffolding with organic ligands. When a laser directs near-infrared light into the compound, the structure of the compound alters the wavelength of the light through a non-linear interaction process, producing light at wavelengths that are visible to the human eye.
The authors note that the warm, white-colored light that's emitted is very similar to a standard tungsten-halogen light source (2856 Kelvin), and can be adjusted based on levels of excitation via the laser. This development could open up new routes for advanced directed illumination technologies, especially since the materials used in this system are cheap, readily available, and easily scalable.
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Rosemann, Nils W. and Eußner, Jens P. and Beyer, Andreas and Koch, Stephan W. and Volz, Kerstin and Dehnen, Stefanie and Chatterjee, Sangam; "A highly efficient directional molecular white-light emitter driven by a continuous-wave laser diode"; Science; 2016
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