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Mercury treatment of optical near-field fibre probes for smoother tips with reduced light leakage

机译:光学近场光纤探头的汞处理,可实现更平滑的尖端,并减少漏光

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A study was conducted to explore the effect of simple mercury treatment on the metal (gold) coating of an optical near-field fibre probe and its performance. The method involves physically contacting a mercury droplet with the fibre probe for a short time, approx 10 s. It is shown that, on interaction with the mercury, the grain boundaries on the gold surface are occupied by mercury atoms, resulting in smoother metal coating and thus reducing the light leakage and enhancing the optical damage threshold level. Probe-to-probe experiments performed on the apertured probes revealed improved spatial distribution of near-field intensity on the mercury treated probes.
机译:进行了一项研究,以探讨简单的汞处理对光学近场光纤探头的金属(金)涂层的影响及其性能。该方法包括使汞滴与光纤探针物理接触约10秒钟。结果表明,与汞相互作用时,金表面的晶界被汞原子占据,从而使金属涂层更光滑,从而减少了漏光并提高了光学损伤阈值水平。在有孔探针上进行的探针对探针实验表明,在经过汞处理的探针上,近场强度的空间分布得到了改善。

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