论文标题
对中尺度圆柱体的不对称照明，对可调光子纳米夹和光子钩的仿真和实验观察
Simulation and experimental observation of tunable photonic nanojet and photonic hook upon asymmetric illumination of a mesoscale cylinder with mask
论文作者
论文摘要
在这封信中，我们报告了可调光子纳米夹和光子钩的数值研究，制造和实验观察结果。在这里，弯曲的光子纳米夹（光子钩子）是由单个中尺度的微磁管生成的，我们是在λ= 405 nm的入射波长下从聚二甲基硅氧烷（PDMS）制造的，并在其边界照明和可调节的面积上生成。对带有铝面罩的硅底物上的直径D =5μm的PDMS微孔管进行了实验观测。用扫描光学显微镜进行测量。我们的实验结果与使用有限差分时间域方法进行的数值预测非常吻合。观察到的光子钩的全宽度分别为θ= 0°，5.7°和20.1°的光子钩的全宽度分别为0.48λ，0.56λ和0.76λ，分别在H = 0、0.25D和0.5D的掩模高度上显示了场定位的特异性。这些光子钩在复杂的操作中具有巨大的潜力，例如在小于波长的弯曲轨迹中的超分辨率成像，表面制造和光力机械操作。
In this letter, we report on numerical study, fabrication and experimental observations of tunable photonic nanojet and photonic hook. Here, the curved photonic nanojets (photonic hooks) are generated by single mesoscale microcylinder that we fabricated from polydimethylsiloxane (PDMS), upon its boundary illumination and adjustable area at an incident wavelength of λ = 405 nm. Experimental observations were conducted for PDMS microcylinder of diameter d = 5 μm deposited on a silicon substrate with the aluminum mask. Measurements were performed with a scanning optical microscope. Our experimental results are in good agreement with numerical predictions performed with the finite-difference time-domain method. The observed the full widths at half-maximum of photonic hooks are 0.48λ, 0.56λ, and 0.76λ for tilt angles of θ = 0°, 5.7°, and 20.1° respectively, at the mask heights of h = 0, 0.25d and 0.5d, respectively, displaying the specificities of the field localization. These photonic hooks have great potential in complex manipulation such as super-resolution imaging, surface fabrication, and optomechanical manipulation in curved trajectories smaller than wavelength.
