Observation of the nonlinear Wood's anomaly on periodic arrays of nickel nanodimers
- Le Mans Univ., Le Mans (France). Inst. des Molecules et Materiaux du Mans, UMR CNRS
- Uppsala Univ. (Sweden). Dept. of Physics and Astronomy
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
- Le Mans Univ., Le Mans (France). Inst. des Molecules et Materiaux du Mans, UMR CNRS; Fritz-Haber-Inst. der MPG, Berlin (Germany)
Linear and nonlinear magnetophotonic properties of periodic arrays of nickel nanodimers are governed by the interplay of the (local) optical response of individual nanoparticles and (nonlocal) diffraction phenomena. The redistribution of light intensity between diffracted beams when a diffraction order onsets or disappears is known as Wood's anomaly. Here in this paper, angular and magnetic-field-dependent near-infrared spectroscopic measurements, performed for different optical wavelengths and grating constants, discriminate between the linear and nonlinear excitation mechanisms of Wood's anomalies. In the nonlinear regime, evidenced by the magnetic second-harmonic generation, 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. Finally, the nonlinear Wood's anomaly manifests itself also in the nonlinear magnetic contrast highlighting the prospects of nonlinear magnetophotonics.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); European Union (EU); Swedish Research Council (SRC)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1492778
- Alternate ID(s):
- OSTI ID: 1489075
- Report Number(s):
- BNL-210935-2019-JAAM; PRBMDO
- Journal Information:
- Physical Review B, Vol. 98, Issue 24; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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