Lasers that provide an energy encompassed in a focal volume of a few cubic wavelengths (λ<sup>3</sup>) can create relativistic intensity with maximal gradients using minimal energy. With particle-in-cell simulations we found that single 200-as pulses could be produced efficiently in a λ<sup>3</sup> laser pulse reflection by means of deflection and phase compression caused by the coherent motion of the plasma electrons that emit these pulses. This novel technique is efficient (~10%) and can produce single attosecond pulses from the millijoule to the joule level.
© 2004 Optical Society of America
Natalia M. Naumova, John A. Nees, Bixue Hou, Gerard A. Mourou, and Igor V. Sokolov, "Isolated attosecond pulses generated by relativistic effects in a wavelength-cubed focal volume," Opt. Lett. 29, 778-780 (2004)