1.
Opt Lett
; 32(19): 2894-6, 2007 Oct 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-17909609
RESUMO
We have demonstrated both slow light in the absorption regime and fast light in the gain regime of a 1.55 microm quantum-dot semiconductor optical amplifier at room temperature. The theory with coherent population oscillations and four-wave mixing effects agrees well with the experimental results. We have observed a larger phase delay at the excited state than that at the ground state transition, likely due to the higher gain and smaller saturation power of the excited state.