Q. Lin, J. Zheng, and W. Becker, "Exact Solution for Sub-cycle Pulsed Focused Vector Beams,"
in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies,
OSA Technical Digest Series (CD)
(Optical Society of America, 2007), paper CFO4.
An accurate description of a sub-cycle pulsed beam is presented, which are exact solutions of Maxwell's equations, and applicable to a focused pulsed beam with a pulse duration down to and below one cycle.