Multiphoton-double-ionization probability linearly depends on laser intensity: Experimental studies of barium

Abstract

Despite inherently complex multiphoton dynamics, our observations show that Ba double ionization with an infrared laser (8800-8920 cm −1 ) resembles a single-photon process; namely, its probability is proportional to the laser intensity. In this regime, single-electron ionization is due to a four-photon resonant transition through the highly perturbed state 6p 2 1 D 2 , whereas double ionization is realized by the two-electron mechanism. Furthermore, we argue that these conclusions are valid for other alkaline-earth-metal atoms and other parameters of laser radiation.

Relativistic Angular Distribution of Photoelectrons in the Tunneling Ionization of Atoms by a Linearly Polarized Laser Field

“…a W rel and W p rel W rel , b W pUp rel and W pUpSt rel . The value of the parabolic coordinate η is fixed at 0.2 Common standard for an ideal laser is one with a single Gaussian spatial mode [21]:…”

Effect of the Corrected Ionization Potential on the HHG Transition Rate in a Linearly Polarized Laser

“…We started with the Gaussian shaped laser pulse which is the simplest and often the most desirable type of beam provided by a laser source which allows the highest concentration of light. Gaussian beams can be represented in the following form [28]:…”

Dependence of formation ions Bа²⁺ on the intensity of radiation at two-electron implementation mechanism two laser fields

“…В ряді попередніх робіт було показано, що реалізація двоелектронного механізму утворення двозарядних іонів (А 2+ ) при нелі-нійній іонізації атомів пов'язана зі збу-дженням і подальшою іонізацією сильно збурених станів цих атомів [1][2][3][4][5][6]. Збурення атомних станів в цьому випадку зумовлено динамічним ефектом Штарка.…”