Hollow-Core Photonic Crystal Fibers for Surface-Enhanced Raman Scattering Probes
Figure 11
Light propagation when focusing a Gaussian beam at (a) the surface of a bulk liquid medium (water), (b) the entrance of a HCPCF with open air channels, (c) the entrance of a HCPCF with all channels filled with liquid, (d) the entrance of a LCPCF with only the core channels filled with liquid, and (e) the entrance of a LCPCF with a 200 μm air gap between the entrance and the liquid surface. In each set of images, the top one corresponds to the field distribution near the entrance of either bulk medium or HCPCF, while the bottom one corresponds to the field distribution after a propagation distance of 400 μm from the entrance.
