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Characterization of near-field optical probes

机译:近场光学探针的表征

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Radiation and collection characteristics of four different near-field optical-fiber probes, namely, three uncoated probes and an aluminum-coated small-aperture probe, are investigated and compared. Their radiation properties are characterized by observation of light-induced topography changes in a photosensitive film illuminated with the probes, and it is confirmed that the radiated optical field is unambiguously confined only for the coated probe. Near-field optical imaging ora standing evanescent-wave pattern is used to compare the detection characteristics of the probes, and it is concluded that, for the imaging of optical-field intensity distributions containing predominantly evanescent-wave components, a sharp uncoated tip is the probe of choice. Complementary results obtained with optical phaseconjugation experiments with the uncoated probes are discussed in relation to the probe characterization.
机译:研究并比较了四种不同的近场光纤探头,即三个未镀膜探头和一个铝镀膜小孔径探头的辐射和收集特性。通过观察用探针照射的光敏膜中的光诱导形貌变化来表征其辐射特性,并且证实了辐射光场仅对于涂覆的探针明确地受到限制。近场光学成像或立式standing逝波图用于比较探头的检测特性,得出的结论是,对于主要包含van逝波分量的光场强度分布成像,应使用锋利的未涂层尖端。选择的探针。讨论了与未镀膜探针在光学相位共轭实验中获得的互补结果。

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