Stimulated generation of superluminal light pulses via four-wave mixing

Abstract

We report on the four-wave mixing of superluminal pulses, in which both the injected and generated pulses involved in the process propagate with negative group velocities. Generated pulses with negative group velocities of up to $v_g=-1/880c$ are demonstrated, corresponding to the generated pulse's peak exiting the 1.7\,cm long medium $\approx 50$\,ns earlier than if it had propagated at the speed of light in vacuum, $c$. We also show that in some cases the seeded pulse may propagate with a group velocity larger than $c$, and that the generated conjugate pulse peak may exit the medium even earlier than the amplified seed pulse peak. We can control the group velocities of the two pulses by changing the seed detuning and the input seed power.

5 pages, 4 figures

References in corpus (3)

• Strong relative intensity squeezing by 4-wave mixing in Rb vapor
• Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor
• Low-distortion slow light using two absorption resonances

Cited by in corpus (5)

• Advanced Detection of Information in Optical Pulses with Negative Group Velocity
• Demonstration of images with negative group velocities
• Strong Coherent Light Amplification with Double Electromagnetically Induced Transparency Coherences
• Quantum beam splitter for orbital angular momentum of light: quantum correlation by four-wave mixing operated in a nonamplifying regime
• Causality and information transfer in simultaneously slow- and fast-light media