L. Tamayo-Rivera, R. C. Fernández-Hernández,  L. Rodríguez-Fernández, R. Rangel-Rojo, A. Oliver, and J. A. Reyes-Esqueda, ‘Wavelength-varying third-order nonlinear optical response of Ag nanoparticles-Si quantum dots integrated plasmonic system’, Optical Materials Express 1, 980-989 (2011).