Optics.org
daily coverage of the optics & photonics industry and the markets that it serves
Menu
Figure 1
The physics of cooling. This schematic shows the principle of optical refrigeration. A suitable material is pumped with laser light, which is absorbed and then emitted as fluorescence. However, if the energy of the fluorescence photons is slightly larger than the pump photons, there is a net energy loss. This is compensated for by the absorption of thermal energy (phonons) from the material, which gets colder.
Copyright © 2019 SPIE EuropeDesigned by Kestrel Web Services