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We observed slow light in a coupled-resonator induced transparency in a tandem microsphere-fiber-taper system. Nearly Gaussian-shaped pulses propagated with a large positive delay of 6.2 ns and 78% transmission through a transparent frequency window.
We observed -4.9 ns negative delay in optical pulse propagation associated with a single Mie scattering process. The observed fast light can well be explained by a directional coupling theory on the under coupling condition.
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