We observed -4.9 ns negative delay in optical pulse propagation in resonant Whispering Gallery Mode of microsphere. The observed fast light can well be explained by a directional coupling theory on the under coupling condition.
© 2005 Optical Society of America
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.1670) Coherence and statistical optics : Coherent optical effects
(290.0290) Scattering : Scattering
(290.4020) Scattering : Mie theory
K. Totsuka and M. Tomita, "Observation of Fast Light in a Microsphere," in Photonic Metamaterials: From Random to Periodic, Technical Dgest (CD) (Optical Society of America, 2006), paper WD7.
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