Control of two-photon double ionization of helium with intense chirped attosecond laser pulses
| Autor: | S. Laulan, P. Lanteigne, Samira Barmaki |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Helium atom Double ionization Attosecond Physics::Optics chemistry.chemical_element Laser Atomic and Molecular Physics and Optics law.invention chemistry.chemical_compound chemistry Atomic electron transition law Ionization Physics::Atomic and Molecular Clusters Chirp Physics::Atomic Physics Atomic physics Helium |
| Zdroj: | Physical Review A. 89 |
| ISSN: | 1094-1622 1050-2947 |
| Popis: | We study the two-photon double-ionization process of the helium atom by solving numerically the nonrelativistic, time-dependent Schr\"odinger 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. |
| Databáze: | OpenAIRE |
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