title: Observation of fast light in Mie scattering processes.
abstract: We observed -4.9 nsec negative group delay in the optical wave-packet propagation through a fiber taper coupled with a single Mie sphere. The observed fast light under the Mie scattering process agrees excellently with the anomalous dispersion calculated on the basis of a directional coupling theory on the undercoupling condition, which also predicts a positive group delay on the overcoupling condition.
authors.affiliation: Department of Physics, Faculty of Science, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan.
authors.forename: Kouki
authors.initials: K
authors.lastname: Totsuka
authors.forename: Makoto
authors.initials: M
authors.lastname: Tomita