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Superluminal Light Pulse Propagation at a Negative Group Velocity
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, L. J. Dogariu, Arthur Kuzmich, Alex |
| Copyright Year | 2003 |
| Abstract | Anomalous dispersion cannot occur in a transparent, passive medium where electromagnetic radiation is being absorbed at all frequencies, as pointed out by Landau and Lifshitz. Here we show, using gain-assisted linear anomalous dispersion, that superluminal pulse propagation can occur in a transparent medium when gain is present. Superluminal light pulse propagation is observed at a negative group velocity of −c/315 through an atomic medium with little pulse distortion. Experimentally, a pulse propagating through the atomic vapor cell has its peak reaching the exit side before entering it, resulting in a negative transit time. This counterintuitive effect is a direct result of the rephasing process owing to the wave nature of light and is not at odds with causality. |
| Starting Page | 277 |
| Ending Page | 286 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/978-1-4419-8907-9_35 |
| Alternate Webpage(s) | http://homepage.univie.ac.at/Markus.Aspelmeyer/lecture/PRA_63_53806_Dogariu.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
