论文部分内容阅读
采用时域有限差分方法对镀金属膜光纤探针在近场光探测中对光场产生的扰动和相互作用过程进行了数值分析。选择纳米孔径的隐失场光场和镀金属膜光纤探针建立了近场光探测的理论模型,讨论了探针孔径尺寸、扫描高度等因素对光场探测的影响,以及测量光场与初始光场之间的关系等。研究结果表明,当探针孔径尺寸与待测纳米孔径尺寸相当,探针扫描高度在接近探针孔径尺寸的一半时,测量得到的光场分布数据能够准确描述初始光场分布。
The time-domain finite difference method is used to analyze the perturbation and interaction of the light field in the near-field photodetection of metal-coated metal fiber probe. The theoretical model of near-field photodetector was established by using the concealed-lost field and nano-aperture metallized fiber probe. The influence of probe aperture size, scanning height and other factors on the detection of light field was discussed. The relationship between the light field and so on. The results show that the measured optical field distribution data can accurately describe the initial optical field distribution when the size of the probe aperture is equivalent to the size of the nanopore to be measured and the height of the probe scan is close to half the size of the probe aperture.