RT Journal Article
T1 Pulsed light beams in vacuum with superluminal and negative group velocities
A1 Porras, Miguel A.
A1 Gonzalo Fonrodona, Isabel
A1 Mondello, Alessia
AB 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.
PB American Physical Society
SN 1539-3755
YR 2003
FD 2003-06-17
LK https://hdl.handle.net/20.500.14352/51361
UL https://hdl.handle.net/20.500.14352/51361
LA eng
NO © 2003 The American Physical Society.
DS Docta Complutense
RD 20 abr 2025