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Room temperature slow and fast light in quantum-dot semiconductor optical amplifiers

2006; American Institute of Physics; Volume: 88; Issue: 6 Linguagem: Inglês

10.1063/1.2171652

1520-8842

Hui Su, Shun Lien Chuang,

Cold Atom Physics and Bose-Einstein Condensates

We demonstrate room temperature optically and electrically controllable group delay using population oscillation in a quantum-dot (QD) semiconductor optical amplifier (SOA). A reduction of the group index up to 10% with a bandwidth of 13 GHz is achieved under different configurations of injection current and optical pump intensity. Our theoretical results based on population pulsation agree well with experimental data. We extract the linewidth enhancement factor and effective carrier diffusion coefficient of the QD SOA. We also observe slow light when the injection current is increased.