By solving the time-dependent Schrödinger equation for the Cs atom, we find that, as long as the spectral bandwidth is sufficiently broad, the asymmetry of photoelectron ejection is strongly phase dependent and persists even when the chirped pulse duration becomes more than several cycles. The asymmetry survives even after the angle integration over the hemisphere, implying that the detection efficiency can be significantly improved. This counterintuitive and robust finding provides a simple way to measure the phase for both transform-limited and chirped pulses.
© 2007 Optical Society of America
Original Manuscript: July 6, 2007
Manuscript Accepted: August 7, 2007
Published: September 28, 2007
Takashi Nakajima and E. Cormier, "Effects of the carrier-envelope phase of chirped laser pulses in the multiphoton ionization regime," Opt. Lett. 32, 2879-2881 (2007)