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Intensities of (a) 5HG, (b) 4HG, and (c) THG signals as a function of input laser intensity for the nanoparticle films. Double-logarithmic plots of (d) 5HG intensity in AlAuCuS, (e) 4HG in AlAuCuS and AlCuS, and (f) THG in AlAuCuS, AlCuS, AuCuS, and Al as a function of pump laser intensity. Here, all of the heterostructure films contain 122 nm Al nanoparticles.
