1. Centro de Ciencias Aplicadas y Desarrollo Tecnológico , Universidad Nacional Autónoma de México , México D.F. , 04510 , México;2. College of Optical Sciences , University of Arizona , Tucson , Arizona 85721 , USA
Abstract:
We calculate the electric field of few-optical-cycle pulses at the focus of a perfectly conducting mirror by adding coherently the Airy diffraction patterns for each pulse frequency. We will show that the pulse suffers temporal spreading generated by a change in the spectrum of the pulse as a function of position in the focal plane, which introduces spatial chirp to the pulse. A double pulse appears near to the diffraction minima of the carrier frequency due to the variations in the spectra.