Abstract

In recent studies of intense field above-threshold multiphoton ionization of atoms, the ponderomotive potential is introduced to explain the suppression of lower energy photoelectrons.¹ This explanation, which we will refer to as PPT (Ponderomotive Potential Theory), predicts an increase of ionization potential with increasing laser intensity. When using linearly polarized laser light with an intensity of about 10¹³ W/cm², and a wavelength of 1064 nm, this increase of the ionization potential will be about an eV.

© 1986 Optical Society of America