Universal optical response of Si-Si bonds and its evolution from nanoparticles to bulk crystals

J. C. Idrobo, A. Halabica, R. H. Magruder, R. F. Haglund, S. J. Pennycook, S. T. Pantelides
2009 Physical Review B  
We use quantum-mechanical calculations and classical theories of the optical absorption of free and embedded nanoparticles to demonstrate a universality of the optical response of Si-Si bonds, independent of bonding configurations. We also demonstrate that the classical theory remains valid down to atomic-scale nanoparticles and that the evolution of the optical spectrum of a free nanoparticle would evolve to the bulk spectrum when the particle contains hundreds of thousands of Si atoms.
doi:10.1103/physrevb.79.125322 fatcat:pmuyekrp2ffxpa2akkcu67765i