MTL News Archives for 2015

Taking control of light emission

May 21, 2015

Researchers find a way of tuning light waves by pairing two exotic 2-D materials.

Researchers have shown that a DC voltage applied to layers of graphene and boron nitride can be used to control light emission from a nearby atom. Here, graphene is represented by a maroon-colored top layer; boron nitride is represented by yellow-green lattices below the graphene; and the atom is represented by a grey circle. A low concentration of DC voltage (in blue) allows the light to propagate inside the boron nitride, forming a tightly confined waveguide for optical signals. Image, Anshuman Kumar Srivastava and Jose Luis Olivares/MIT.

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