Electrically tunable slow and fast lights in a quantum-dot semiconductor optical amplifier near 1.55 microm.
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.
Matsudaira
A
A
Department of Electrical and Computer Engineering, University of Illinois, IL 61801, USA.
Lee
D
D
Kondratko
P
P
Nielsen
D
D
Chuang
S L
SL
Kim
N J
NJ
Oh
J M
JM
Pyun
S H
SH
Jeong
W G
WG
Jang
J W
JW