Single molecule can shift the phase of a laser beam

(PhysOrg.com) -- The ability to control light forms the basis of many technologies, from microscopy to optical computing. Now, a team of scientists from ETH in Zurich, Switzerland, has demonstrated that a single organic molecule can shift the phase of a laser beam by three degrees. That amount of phase shift is enough to allow the researchers to perform applications such as recording the first phase-contrast images of single molecules and fabricating a single-molecule electro-optical phase switch.

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