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Both optically and electrically controllable slow and superluminal light are demonstrated via four-wave mixing in semiconductor optical amplifiers. Tunable delays up to 1.2 ns are achieved for 0.5 GHz, corresponding to a RF phase change of 1.2 p.
We demonstrate slow light at room temperature using a quantum-dot semiconductor optical amplifier with a controllable delay by forward and reverse bias below the transparency current level.
We demonstrate all-optical tunable delays as long as 4 ps in a silicon-on-insulator waveguide using stimulated Raman scattering, which represents an important step towards implementing optically tunable dispersion in small-scale photonic devices.
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