All-optical transistor

Controlling and modulating the flow of light is essential in today's telecommunications-based society. Professor Tobias Kippenberg and his team in EPFL's Laboratory of Photonics and Quantum Measurements have discovered a novel way to couple light and vibrations. Using this discovery, they built a device in which a beam of light travelling through an optical microresonator could be controlled by a second, stronger light beam. The device thus acts like an optical transistor, in which one light beam influences the intensity of another...

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