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Scientists at the Vienna University of Technology (TU Wien) have uncovered the source of a special type of quantum light created at certain points in the 2D material tungsten diselenide (WSe2) when it is supplied with energy. They found that this special-nature light, which exhibits an antibunching effect, results from the interaction between single atomic defects in the material and mechanical strain. Computer simulations showed how electrons were driven to specific places in the WSe2, where they were captured by a defect, lost energy, and emitted a photon.
WSe2 is an atomically thin material, where tungsten atoms are in the middle, coupled to selenium atoms below and above. If energy is supplied to a WSe2 layer, for example by…READ MORE