10 November 2005 Calculation of evanescent field interaction with metallic nanoparticles immobilized on the air holes of solid-core photonic crystal fiber
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Abstract
We report the calculation of the attenuation coefficient of a probing optical mode due to interaction with metallic nanoparticles randomly distributed in the air holes of a solid core photonic crystal fiber (PCF) for SERS-based sensing and detection. The approach employed is an approximation of the solid core PCF with conventional curricular fiber considering a similar total internal reflection mechanism for mode propagation and almost complete concentration of the mode flux in the core of PCF. Losses due to the absorption and radiative scattering of electromagnetic energy by nanoparticles are examined. The analysis demonstrates a critical dependence of the absorption losses approaching the resonant localized surface plasmon's excitation and very fast rise of radiative losses with the increase of nanoparticle size. The physics of proper integral Raman spectroscopy is also discussed.
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Alexander Raspopin, Alexander Raspopin, Hong-Liang Cui, Hong-Liang Cui, Henry Du, Henry Du, } "Calculation of evanescent field interaction with metallic nanoparticles immobilized on the air holes of solid-core photonic crystal fiber", Proc. SPIE 6005, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications, 60050F (10 November 2005); doi: 10.1117/12.630192; https://doi.org/10.1117/12.630192
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