Engineering researchers report that they developed a new, efficient way to modulate and enhance an important type of nonlinear optical process: optical second harmonic generation -- where two input photons are combined in the material to produce one photon with twice the energy -- from hexagonal boron nitride through micromechanical rotation and multilayer stacking. Their work is the first to exploit the dynamically tunable symmetry of 2D materials for nonlinear optical applications.
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Friday, March 5, 2021
Twistoptics: A new way to control optical nonlinearity
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