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Controlling electron spin dynamics in bichromatic Kapitza-Dirac scattering by the laser field polarization
- Source :
- Phys. Rev. A 95, 042124 (2017)
- Publication Year :
- 2017
-
Abstract
- Spin-dependent Kapitza-Dirac scattering of electron beams from counterpropagating bichromatic laser waves in various polarization geometries is studied. The corresponding scattering probabilities are obtained by analytical and numerical solutions of the time-dependent Dirac equation, assuming a field frequency ratio of 2. When the fundamental field mode is circular-polarized, we show that spin dynamics are generally suppressed at low intensities, but can become distinct at high intensities. Conversely, when a linearly or elliptically polarized fundamental mode is combined with a second harmonic of circular polarization, strong spin effects arise already at low field intensities. In particular, a polarization configuration is identified which acts as a spin filter for free electrons.<br />Comment: 9 pages, 8 figures
- Subjects :
- Physics - Atomic Physics
Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 95, 042124 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1701.05951
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.95.042124