Contact: Lynn Yarris
DOE/Lawrence Berkeley National Laboratory
Caption: 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.
Credit: Image courtesy of Zhang group, UC Berkeley/Berkeley Lab
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Related news release: Berkeley Lab researchers create a nonlinear light-generating zero-index metamaterial