From microscopes to data transfer via optical fibers all the way to modern quantum technologies, light plays an important role in science and industry. Particularly methods for changing the color--and hence the frequency and wavelength--of light are of great importance in modern applications. Those methods require the use of nonlinear crystals. In such crystals, two photons of a particular frequency can, for instance, be turned into one photon having twice that frequency--say, two red ones into ...
From microscopes to data transfer via optical fibers all the way to modern quantum technologies, light plays an important role in science and industry. Particularly methods for changing the color--and hence the frequency and wavelength--of light are of great importance in modern applications. Those methods require the use of nonlinear crystals. In such crystals, two photons of a particular frequency can, for instance, be turned into one photon having twice that frequency--say, two red ones into ...
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