Notably, only minimal emission was detected on the blue side of the spectrum, in the spectral region of interband absorption. This observation is distinctly different from previous studies on the emission from rough gold surfaces 1,2 and nanoparticles, which reported substantial PL from interband recombination at the L-point (∼ 2.1 eV) in this spectral region. Two mechanisms might explain our negligibly low blue emission: i) The fraction of the interband photoluminescence that is enhanced by the LSPR is much stronger than the emission that has no spectral overlap with the LSPR, or ii) interband emission at the L-point is suppressed by a nonradiative decay channel.