(color online) (a) PL (solid lines) and scattering (dots) of a gold nanorod in different media. (Inset) LSP peak of nanorods in different media and fitting line (from Ref. [18], Fig. 2). (b) Anti-Stokes emission as a function of photon energy. Data are respectively fitted (lines) by a Boltzmann statistics distribution (blue solid line) and Lorentz line shape (purple dashed line) for the anti-Stokes part only. The inset shows the anti-Stokes spectra at different illumination light intensities with corresponding fitting lines (from Ref. [20], Fig. 3). (c) A complete analysis of three components of plasmon-enhanced fluorescence spectrum and coupling-configuration dependent spectra. OPL spectra of free single gold nanorod (black) and free single fluorescent nanodiamond (red) before coupling, plasmon-enhanced spectrum (blue), and scattering spectrum (green) after coupling of a single gold nanorod and a single fluorescent nanodiamond (from Ref. [24], Fig. 2 (a)). (d) Decay dynamics of multiphoton photoluminescence for antenna arrays of L = 140 nm (red curves) and L = 80 nm (black curves). The instrument response function (IRF) is traced with a black dashed line (from Ref. [51], Fig. 3(c)).