Second-harmonic generation in lithium niobate nanowires for local fluorescence excitation
We study the nonlinear optical properties of lithium niobate (LiNbO₃) nanowires (NWs) fabricated by a top-down ion beam enhanced etching method. First, we demonstrate generation and propagation of the second-harmonic (SH) light in LiNbO₃ NWs of typical rectangular cross-sections of 400 x 600 nm² and length from 10 to 50 μm. Then, we show local fluorescent excitation of 4',6-diamidino-2-phenylindole (DAPI) dye with the propagated SH signal in standard concentrations as for biological...[Show more]
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