Journal
ACS PHOTONICS
Volume 3, Issue 2, Pages 179-183Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.5b00504
Keywords
nonlinear optics; magnetoplasmonics; surface plasmon resonance; magnetophotonics; Kretschmann geometry; nanotechnology
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Funding
- Alexander von Humboldt Stiftung
- European Research Council/ERC grant
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Nonlinear magnetoplasmonics aims to utilize plasmonic excitations to control the mechanisms and tailor the efficiencies of nonlinear light frequency conversion at the nanoscale. We investigate the mechanisms of magnetic second-harmonic generation in hybrid gold cobalt silver multilayer structures, which support propagating surface plasmon polaritons at both fundamental and second-harmonic frequencies. Using magneto-optical spectroscopy in Kretschmann geometry, we show that the huge magneto-optical modulation of the second-harmonic intensity is dominated by the excitation of surface plasmon polaritons at the second-harmonic frequency, as shown by tuning the optical wavelength over the spectral region of strong plasmonic dispersion. Our proof-of-principle experiment highlights bright prospects of nonlinear magnetoplasmonics and contributes to the general understanding of the nonlinear optics of magnetic surfaces and interfaces.
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