We show the formation of ultraslow bright and dark optical solitons in a lifetime-broadened three-state atomic system under Raman excitation. We also discuss why such ultraslow optical solitons may not exist under the conditions of the usual electromagnetically induced transparency configuration where zero one- and two-photon detunings are required.
© 2004 Optical Society of America
(020.1670) Atomic and molecular physics : Coherent optical effects
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(270.5530) Quantum optics : Pulse propagation and temporal solitons
Ying Wu and Lu Deng, "Ultraslow bright and dark optical solitons in a cold three-state medium," Opt. Lett. 29, 2064-2066 (2004)