The blue circles in Figure represent the PLE spectrum determined by integrating the PL spectra over all emission wavelengths for each λ ex . The consistency between the spectra obtained from both emission windows was ensured by collecting the emission for an excitation wavelength of 525 nm in both spectral windows and adjusting the integrated emission from window II to the emission from window I (see also SI for a detailed procedure). The PLE monotonically decreases with increasing wavelength, confirming the trend suspected from the emission spectra. Interestingly, PLE does not exhibit any correlation with the plasmon resonance. This absence of an LSPR signature evidently implies that neither electronic Raman scattering, which strongly relies on plasmon-enhancement, nor plasmon-assisted inter-and intraband absorption 62 contribute to the observed emission. Rather, the excitation spectrum in Figure suggests that, similar to a smooth film , only direct interband absorption leads to emission.