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arXiv · 1811.04189

Observation of the nonlinear Wood's anomaly on periodic arrays of nickel nanodimers

Ngoc-Minh Tran·Ioan-Augustin Chioar·Aaron Stein·Alexandr Alekhin·Vincent Juvé·Gwenaëlle Vaudel·Ilya Razdolski·Vassilios Kapaklis·Vasily Temnov
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Abstract

Linear and nonlinear magneto-photonic properties of periodic arrays of nickel nanodimers are governed by the interplay of the (local) optical response of individual nanoparticles and (non-local) diffraction phenomena, with a striking example of Wood's anomaly. Angular and magnetic-field dependencies of the second harmonic intensity evidence Wood's anomaly when new diffraction orders emerge. Near-infrared spectroscopic measurements performed at different optical wavelengths and grating constants discriminate between the linear and nonlinear excitation mechanisms of Wood's anomalies. In the nonlinear regime the Wood's anomaly is characterized by an order-of-magnitude larger effect in intensity redistribution between the diffracted beams, as compared to the linear case. The nonlinear Wood's anomaly manifests itself also in the nonlinear magnetic contrast highlighting the prospects of nonlinear magneto-photonics.

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Ngoc-Minh Tran, Ioan-Augustin Chioar, Aaron Stein, Alexandr Alekhin, Vincent Juvé, Gwenaëlle Vaudel, Ilya Razdolski, Vassilios Kapaklis, Vasily Temnov. 2018-11-10. Observation of the nonlinear Wood's anomaly on periodic arrays of nickel nanodimers. https://doi.org/10.1103/physrevb.98.245425

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