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- W4308761014 abstract "Notwithstanding its long history, the study of nonlinear optics from metal surfaces is still an active field of research. For instance, in view of the presence of absorption questions remain concerning the possibility of significantly enhancing harmonic conversion efficiencies in the visible and UV ranges. While to many it may seem that metals do not easily lend themselves to that purpose, they are nevertheless crucial materials in the development of nanophotonics, and more generally, to electromagnetism at the nanoscale. Here, we report our experimental observations and numerical simulations of second and third harmonic generation from a gold nanograting, which exhibits a plasmonic resonance whose spectral position depends on incident angle. All things being equal, the enhancement of nonlinear optical processes from the UV to the near IR range manifests itself in dramatic manner: second harmonic generation conversion efficiencies increase more than three orders of magnitude compared to a flat gold mirror, while third harmonic generation conversion efficiency increases by nearly four orders of magnitude, both in excellent agreement with predictions. The clear inferences one may draw from our results are that our model describes the dynamics with unprecedented accuracy, and that much remains to be revealed in the development of nonlinear optics of metals at the nanoscale." @default.
- W4308761014 created "2022-11-15" @default.
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- W4308761014 date "2022-11-09" @default.
- W4308761014 modified "2023-09-27" @default.
- W4308761014 title "Dramatic enhancement of second and third harmonic generation in gold nanogratings in the visible and UV ranges" @default.
- W4308761014 doi "https://doi.org/10.48550/arxiv.2211.05111" @default.
- W4308761014 hasPublicationYear "2022" @default.
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