Bending losses of sharply bent optical nanofibers or nanowires coupling with Au nanoparticles (Au NPs) are investigated using a finite-difference time-domain (FDTD) method. Relying on the ultra-tight optical confinement of the Au NPs, bending losses of the sharply bent optical nanofibers or nanowires can be effectively reduced by attaching Au NPs to the inner edge of the bent nanofibers or nanowires. At 650-nm wavelength, a bending-loss reduction of 4.7 dB/90° is obtained for a 300-nm-diameter SiO₂ nanofiber coupling with seven 140-nm-diameter Au NPs when the bending radius is 1.0 $\mathrm{\mu }$m. Our results suggest a potential route to realizing sharply-bent optical nanofibers or nanowires with acceptable bending losses for constructing highly compact photonic integrated circuits or devices.

使用有限差分时域 (FDTD) 方法研究了与 Au 纳米粒子 (Au NP) 耦合的急剧弯曲的光学纳米纤维或纳米线的弯曲损耗。依靠Au NPs的超紧密光学限制，通过将Au NPs附着在弯曲的纳米纤维或纳米线的内边缘，可以有效地降低急剧弯曲的光学纳米纤维或纳米线的弯曲损耗。在 650 nm 波长下，当弯曲半径为 1.0 时，直径为 300 nm 的 SiO ₂纳米纤维与七个直径为 140 nm 的 Au NP 耦合的弯曲损耗降低了 4.7 dB/90°$\mathrm{\mu }$米。我们的结果提出了一种潜在的途径，可以实现具有可接受的弯曲损耗的急剧弯曲的光学纳米纤维或纳米线，以构建高度紧凑的光子集成电路或器件。