Strong-Field Kapitza-Dirac Scattering of Neutral Atoms

被引：26
作者：
Eilzer, S. [1 ]
Zimmermann, H. [1 ]
Eichmann, U. [1 ,2 ]
机构：
[1] Max Born Inst, D-12489 Berlin, Germany
[2] Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 11期
关键词：
STANDING LIGHT WAVES; MULTIPHOTON IONIZATION; LASER FIELDS; ACCELERATION; DIFFRACTION; REFLECTION; OPTICS;
D O I：
10.1103/PhysRevLett.112.113001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Laser induced strong-field phenomena in atoms and molecules on the femtosecond (fs) time scale have been almost exclusively investigated with traveling wave fields. In almost all cases, approximation of the strong electromagnetic field by an electric field purely oscillating in time suffices to describe experimental observations. Spatially dependent electromagnetic fields, as they occur in a standing light wave, allow for strong energy and momentum transfer and are expected to extend strong-field dynamics profoundly. Here we report a strong-field version of the Kapitza-Dirac effect for neutral atoms where we scatter neutral He atoms in an intense short pulse standing light wave with fs duration and intensities well in the strong-field tunneling regime. We observe substantial longitudinal momentum transfer concomitant with an unprecedented atomic photon scattering rate greater than 10(16)s(-1).
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页数：5
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