Extinction spectra of silver nanoparticle arrays

摘要: The optical properties of silver nanoparticle arrays are studied by T-matrix and discrete dipole approximation (DDA) methods. Arrays spherical particles with a radius 30 nm investigated particular emphasis on the influence array disorder response. We find that peak intensities decrease when becomes disordered plasmon resonance wavelengths generally exhibit smaller blue shifts compared to perfectly ordered arrays. Using an extended DDA method, we calculate extinction spectra nanodisk arrays, examining variation wavelength interparticle spacing (at fixed particle size). calculated shift decreasing is found be in excellent agreement recent experiments.