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DataRay Inc. - ISO 11146-Compliant Laser Beam Profilers

One at a Time, Please

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Hank Hogan

Photons are gregarious. Unlike electrons, photons have no trouble congregating. For most applications, that's not a problem. However, this behavior makes it difficult to fill regular time slots with a single photon. Microscopic posts act as single-photon turnstiles, emitting light one photon at a time. Courtesy of Yoshihisa Yamamoto, Stanford University. Reducing the intensity of radiation ensures that no more than one photon will be in any time slot, noted Yoshihisa Yamamato, a professor of applied phys-ics and electrical engineering at Stanford Uni-versity. But it often means that many...Read full article

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    Published: April 1999
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