Control of two-photon double ionization of helium with intense chirped attosecond laser pulses

被引：24
|
作者：
Barmaki, S. [1 ]
Lanteigne, P. [1 ]
Laulan, S. [1 ]
机构：
[1] Univ Moncton, Lab Phys Computat & Photon, Shippegan, NB E8S 1P6, Canada
来源：
PHYSICAL REVIEW A | 2014年 / 89卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Photons;
D O I：
10.1103/PhysRevA.89.063406
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the two-photon double-ionization process of the helium atom by solving numerically the nonrelativistic, time-dependent Schrodinger equation in its full dimensionality. We investigate with intense chirped attosecond laser pulses of 23.5-nm wavelength the two-photon absorption near and above the sequential threshold. We show how it is possible by adjusting the chirp parameter to control the electronic transitions inside the atom, thereby reinforcing or weakening the ionization process. Attosecond chirped laser pulses offer a promising way to probe and control the two-photon double ionization of helium when compared with attosecond transform-limited pulses.
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收藏
页数：5
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