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. 2019 Oct 1;9(10):1401. doi: 10.3390/nano9101401

Figure 7.

Figure 7

Comparison of SERS background power PBG (x-axis) and SERS Stokes power PS (y-axis) of different SERS platforms. Both parameters are normalized on the input power and the integration time. FS indicates free-space and WG is the waveguide-based excitation and collection of the SERS signal.