MIT’ers build optical transistor




MIT’ers build optical transistor

Researchers at the Massachusetts Institute of Technology have built an optical switch that a light beam can be switched on and off. There would only be a single photon to be necessary.

The experimental device that was by the MIT staff together with colleagues from the Vienna University of Technology and Harvard developed , can be called an optical transistor. In an electric transistor is a large flow of electrons with a small stream control switches: the “optical transistor” from MIT photons take the role of electrons. That would allow optical processors, which are faster and more economical than conventional processors.

The optical transistor is composed of two mirrors, an optical resonator or cavity shapes. The mirrors are transparent for light of specific wavelengths. When the switch is on, the light through the mirrors, but when switched off, only twenty percent of the light by the mirrors. For this switching, a single photon used, which is a gasatoom in the cavity start: that affects the wavelength of the light, and can be less light by the mirrors and the ‘optical transistor’ is off.

The optical transistor is a prototype for the time being: the experimental set-up is not suitable for practical applications. That would change if the properties are replicated in more conventional semiconductor materials: now, the gas in the cavity still super cooled. Once reduced to practical dimensions, the optical transistor are especially interesting for quantum computers. Dit is geen optische transistor


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