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- W3099668566 abstract "Abstract Nonlinear transmission lines (NLTLs) are nonlinear electronic circuits used for parametric amplification and pulse generation, and it is known that left-handed NLTLs support enhanced harmonic generation while suppressing shock wave formation. We show experimentally that in a left-handed NLTL analogue of the Su-Schrieffer-Heeger (SSH) lattice, harmonic generation is greatly increased by the presence of a topological edge state. Previous studies of nonlinear SSH circuits focused on solitonic behaviours at the fundamental harmonic. Here, we show that a topological edge mode at the first harmonic can produce strong propagating higher-harmonic signals, acting as a nonlocal cross-phase nonlinearity. We find maximum third-harmonic signal intensities five times that of a comparable conventional left-handed NLTL, and a 250-fold intensity contrast between topologically nontrivial and trivial configurations. This work advances the fundamental understanding of nonlinear topological states, and may have applications for compact electronic frequency generators." @default.
- W3099668566 created "2020-11-23" @default.
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- W3099668566 date "2019-03-07" @default.
- W3099668566 modified "2023-10-14" @default.
- W3099668566 title "Topologically enhanced harmonic generation in a nonlinear transmission line metamaterial" @default.
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- W3099668566 doi "https://doi.org/10.1038/s41467-019-08966-9" @default.
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