title: Nonlinear optical properties of phosphorous-doped Si nanocrystals embedded in phosphosilicate glass thin films.
abstract: Nonlinear optical properties of phosphorus (P)-doped silicon (Si) nanocrystals are studied by z-scan technique in femtosecond regime at around 1.6 eV. The nonlinear refractive index (n(2)) and nonlinear absorption coefficient (beta) of Si-ncs are significantly enhanced by P-doping. The enhancement of n(2) is accompanied by the increase of the linear absorption in the same energy region, suggesting that impurity-related energy states are responsible for the enhancement of the nonlinear optical response.
authors.affiliation: Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Nada, Kobe, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Imakita
authors.forename: Masahiko
authors.initials: M
authors.lastname: Ito
authors.forename: Minoru
authors.initials: M
authors.lastname: Fujii
authors.forename: Shinji
authors.initials: S
authors.lastname: Hayashi
mesh_terms: D003198:Computer Simulation; D005898:Glass / Q000737:chemistry; D008027:Light; D008422:Materials Testing; D008567:Membranes, Artificial; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010758:Phosphorus / Q000737:chemistry*; D012542:Scattering, Radiation; D017640:Silicates / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*
chemical_list: D008567:Membranes, Artificial; D017640:Silicates; D010758:Phosphorus; D012825:Silicon