Hollow-Core Photonic Crystal Fibers for Surface-Enhanced Raman Scattering Probes

Figure 2

SERS spectra of RhB. Curve A: obtained from the measuring tip of the HCPCF probe (excitation power of ~4.7 mW, scan time of 20 s, and accumulation time of 5). Curve B: a smoothed subtraction between curve A and the HCPCF background (inset). Curve C: obtained using a SERS substrate coated on a Si wafer (excitation power of ~0.47 mW, scan time of 20 s, and accumulation time of 1).