‘Valleytronics’ discovery could extend limits of Moore’s Law

Science Daily  May 1, 2018
An international team of researchers (USA – UC Berkeley, Lawrence Berkeley National Laboratory, Singapore, China) has shown that tin(II) sulfide is able to absorb different polarizations of light and then selectively reemit light of different colors at different polarizations. This is useful for concurrently accessing both the usual electronic and the material’s degrees of freedom. SnS possesses selectivity at room temperature without additional biases apart from the excitation light source. With this finding, researchers will be able to develop operational valleytronic devices, which may one day be integrated into electronic circuits. The unique coupling between light and valleys in this new material may also pave the way toward future hybrid electronic/photonic chips… read more. Open Access TECHNICAL ARTICLE

This schematic illustrates the variation of electron energy in different states, represented by curved surfaces in space. Credit: Berkeley Lab

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