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Porras, Miguel A. and Gonzalo Fonrodona, Isabel and Mondello, Alessia (2003) Pulsed light beams in vacuum with superluminal and negative group velocities. Physical review E, 67 (6). 066604/1-066604/9. ISSN 1539-3755
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Official URL: http://dx.doi.org/10.1103/PhysRevE.67.066604
Abstract
We study the group velocity of pulsed light beams in vacuum. Gouy's phase associated with the diffraction of transversally limited pulses can create a strong anomalous dispersion in vacuum leading to highly superluminal and negative group velocities. As a consequence, a focusing pulse can diverge beyond the focus before converging into it. The experimental feasibility is discussed.
| Item Type: | Article |
|---|---|
| Additional Information: | © 2003 The American Physical Society. |
| Uncontrolled Keywords: | Propagation |
| Subjects: | Sciences > Physics > Optics |
| ID Code: | 29892 |
| Deposited On: | 30 Apr 2015 13:21 |
| Last Modified: | 30 Apr 2015 13:21 |
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