Fig. 4: Saturation of pulsed Raman scattering from many NPoMs. | Nature Communications

Fig. 4: Saturation of pulsed Raman scattering from many NPoMs.

From: Giant optomechanical spring effect in plasmonic nano- and picocavities probed by surface-enhanced Raman scattering

Fig. 4

a–c Averaged power-normalized SERS spectra for increasing in-coupled average powers at different pump wavelengths \({\lambda }_{l}\). d–f Integrated SERS emission from \({\omega }_{\nu 1}\,\)= 1586 cm−1 mode (colours show laser power) and integrated background + softened spectral region (grey, x6), excited by pulsed laser at \({\lambda }_{l}\,\)= 633, 658, 700 nm. Open points are averages of individual measurements in each power range. Insets show relative position of pump wavelength and plasmon resonances. g–i Integrated SERS normalized by in-coupled peak intensity and integration time, error bars indicate their standard deviation. The critical laser intensity for saturation is marked as Ic (indicated in the main text).

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