Sergeyev, Anton; Geiss, Reinhard; Solntsev, Alexander; Sukhorukov, Andrey; Schrempel, Frank; Pertsch, Thomas; Grange, Rachel
We experimentally demonstrate practical approaches to enhance second-harmonic (SH) generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross-section and length up to tens of micrometers. We establish that parametric interactions of guided modes propagating along the NW determine the SH output power, which can be therefore controlled by the NW length. We show that the SH power is increased by about 84 times at wavelengths corresponding to modal phase-matching....[Show more]
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