Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
Nano Lett. 2011 Jun 8;11(6):2517-21. doi: 10.1021/nl201085b. Epub 2011 May 24.
We have synthesized and characterized three types of perovskite alkaline niobate nanowires: NaNbO(3), KNbO(3), and LiNbO(3) (XNbO(3)). All three types of nanowires exhibit strong nonlinear response. Confocal imaging has been employed to quantitatively compare the efficiency of synthesized nanowires to generate second harmonic signal and to show that LiNbO(3) nanowires exhibit the strongest nonlinear response. We also investigated the polarization response of the second harmonic generation (SHG) signal in all three types of alkaline nanowires for the two geometries tractable by our optical trapping setup. The SHG signal is highly influenced by the nanowire crystallinity and experimental geometry. We also demonstrate for the first time wave-guiding of SHG signal in all three types of alkaline niobate nanowires. By carefully examining nonlinear properties of (XNbO(3)) nanowires we suggest which type of wires are best suited for the given application.
NaNbO(3)、KNbO(3)和 LiNbO(3) (XNbO(3))。所有三种类型的纳米线都表现出很强的非线性响应。共聚焦成像被用来定量比较合成纳米线产生二次谐波信号的效率，并表明 LiNbO(3)纳米线表现出最强的非线性响应。我们还研究了在我们的光阱设置可处理的两种几何形状下，三种类型的堿性纳米线中二次谐波产生 (SHG)信号的极化响应。SHG 信号受纳米线结晶度和实验几何形状的强烈影响。我们还首次展示了三种类型的堿性铌酸盐纳米线中 SHG 信号的波导。通过仔细研究 (XNbO(3))纳米线的非线性特性，我们建议哪种类型的纳米线最适合给定的应用。
