Novel index-guided photonic crystal fiber surface-enhanced Raman scattering probe.
Novel index-guided photonic crystal fiber surface-enhanced Raman scattering probe.
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DOI：
10.1364/oe.16.008300
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发表时间：
2008-05
期刊：
影响因子：
3.8
通讯作者：
He Yan;Jie Liu;Changxi Yang;G. Jin;C. Gu;L. Hou
中科院分区：
文献类型：
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作者：
He Yan;Jie Liu;Changxi Yang;G. Jin;C. Gu;L. Hou
提出了一种新型的折射率IG光子晶体光纤表面增强拉曼探针。与普通光子晶体光纤不同的是，IGPCF在实心石英纤芯和光子晶体包层孔之间插入了四个大的空气孔。金纳米粒子，作为表面增强拉曼散射（Sers）基板，要么被涂覆在孔的内表面上或混合在分析物溶液中，在两个单独的实验中，分别。分析物溶液通过毛细管效应进入孔中。在二氧化硅核中传播的激发光通过倏逝波与金纳米颗粒和分析物相互作用，当四个大孔填充有液体时，倏逝波显著延伸到四个大孔中，导致激发光与纳米颗粒/分析物之间的大的相互作用体积。
We demonstrate a novel index-guided (IG) photonic crystal fiber (PCF) surface-enhanced Raman probe. Different from a regular PCF, the IGPCF has four big air holes inserted between the solid silica core and the photonic crystal cladding holes. The gold nanoparticles, serving as the surface enhanced Raman scattering (SERS) substrate, are either coated on the inner surface of the holes or mixed in the analyte solution in two separate experiments, respectively. The analyte solution enters the holes via the capillary effect. The excitation light propagating in the silica core interacts with the gold nanoparticles and the analyte through the evanescent wave which extends significantly into the four big holes when they are filled with liquid leading to a large interaction volume between the excitation light and the nanoparticles/analyte.