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Matching momenta: a thin-film of GaAs and InGaAs, overlaid with graphene.
Matching momenta: The researchers from MIT and Israel's Technion used a thin-film material composed of layers of gallium-arsenide and indium-gallium-arsenide, overlaid with a layer of graphene. It could produce strong interactions between light and particles to enable highly tunable lasers or LEDs. Image: MIT/Technion Researchers.
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