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News and Views
Nature 433, 691-692 (17 February 2005) | doi:10.1038/433691a; Published online 16 February 2005
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Optoelectronics: Silicon shines on
Jerome Faist1
Abstract
Researchers are getting better at making silicon do what it really does not like to do — emit light. A silicon laser is now demonstrated that has promising features for future practical applications.
Nonlinear optics could be called the optical equivalent of the philosopher's stone: just as lead could be turned into gold by changing the number of protons in its atoms, so the colour of a laser beam can be changed from blue to red by crossing a nonlinear crystal. In nonlinear optics, incident light is converted to light of a different wavelength by making use of specific, nonlinear properties of a material.
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Jerome Faist is at the Physics Institute, University of Neuchâtel, CH-2000
Neuchâtel, Switzerland.
e-mail: Email: jerome.faist@unine.ch
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