Physics in the News

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A new angle on controlling light

System could provide first method for filtering light waves based on direction.

David L. Chandler, MIT News Office
March 27, 2014

Light waves can be defined by three fundamental characteristics: their color (or wavelength), polarization, and direction. While it has long been possible to selectively filter light according to its color or polarization, selectivity based on the direction of propagation has remained elusive.

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