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  • Title: Structure fits the purpose: photonic crystal fibers for evanescent-field surface-enhanced Raman spectroscopy.
    Author: Khaing Oo MK, Han Y, Kanka J, Sukhishvili S, Du H.
    Journal: Opt Lett; 2010 Feb 15; 35(4):466-8. PubMed ID: 20160786.
    Abstract:
    We report numerical simulation and hyperspectral Raman imaging of three index-guiding solid-core photonic crystal fibers (PCFs) of different air-cladding microstructures to assess their respective potential for evanescent-field Raman spectroscopy, with an emphasis on achieving surface-enhanced Raman scattering (SERS) over the entire fiber length. Suspended-core PCF consisting of a silica core surrounded by three large air channels conjoined by a thin silica web is the most robust of the three SERS-active PCFs, with a demonstrated detection sensitivity of 1x10(-10) M R6G in an aqueous solution of only approximately 7.3 microL sampling volume.
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