Partitioning of the linear photon momentum in multiphoton ionization

Details Partitioning of the linear photon momentum in multiphoton ionization Partitioning of the linear photon momentum in multiphoton ionization

2011-02-09

arxiv.org/abs/1102.1881v1

Phys. Rev. Lett. 106, 193002 (2011)

Physics

Optics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.106.193002

The balance of the linear photon momentum in multiphoton ionization is studied experimentally. In the experiment argon and neon atoms are singly ionized by circularly polarized laser pulses with a wavelength of 800 nm and 1400 nm in the intensity range of 10^{14} - 10^{15} W/cm^2. The photoelectrons are measured using velocity map imaging. We find that the photoelectrons carry linear momentum corresponding to the photons absorbed above the field free ionization threshold. Our finding has implications for concurrent models of the generation of terahertz radiation in filaments.

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