Blog Post Image: Berkeley Lab Researchers Create a Nonlinear Light-generating Zero-Index MetaMaterial

In this graphic showing four-wave mixing in a positive/negative-index (upper) and zero-index (lower) metamaterial, forward-propagating FWM is much stronger than backward FWM for the positive/negative-index material but about the same in both directions for the zero-index metamaterial. Image courtesy of Zhang group (Click image to enlarge)

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