Physicists observe amplification of an optical signal within cubic nonlinear nanostructures

The coherent amplification of a localized optical signal within a planar titanium nitride nanoantenna has been achieved by scientists of Kazan Federal University (under the leadership of Sergey Kharintsev) and physicists from Harvard University, Nazarbayev University, and Imperial College London. The results have been recently published in Nano Letters.

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