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. 2016 Feb 8;3(3):471–477. doi: 10.1021/acsphotonics.5b00707

Figure 3.

Figure 3

(a) Evolution of SERS intensity of TPT vibrational modes at 1585 cm–1 (red), 1256 cm–1 (green), and 1080 cm–1 (blue) vs emitted Raman wavelength, compared to scattering spectra (black) for four NPoMs (lines show Gaussian fits). Also shown is SERS background around 1585 cm–1 (orange). (b) Calculated resonance shift Δλ = λnear-field – λscat for different size nanoparticles in NPoM and different gap sizes. (c) Comparison of wavelengths of peak SERS emission and the dark-field plasmon resonance, for experiments (black) and simulations (orange). Polynomial fit of experimental points is shown as a plain black line.