Electron spin filter and polarizer in a standing light wave
arXiv:1604.06201 · doi:10.1103/PhysRevA.96.052132
Abstract
We demonstrate the theoretical feasibility of spin-dependent diffraction and spin-polarization of an electron in two counter-propagating, circularly polarized laser beams. The spin-dynamics appears in a two-photon process of the Kapitza-Dirac effect in the Bragg regime. We show the spin-dependence of the diffraction process by comparison of the time-evolution of a spin-up and spin-down electron in a relativistic quantum simulation. We further discuss the spin properties of the scattering by studying an analytically approximated solution of the time-evolution matrix. A classification scheme in terms of unitary or non-unitary propagation matrices is used for establishing a generalized and spin-independent description of the spin properties in the diffraction process.
13 pages, 5 figures
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- Spin-dependent two-photon Bragg scattering in the Kapitza-Dirac effect
- Four-Photon Kapitza-Dirac Effect as Electron Spin Filter
- Beam focus and longitudinal polarization influence on spin dynamics in the Kapitza-Dirac effect
- Two-dimensional simulation of the spin-flip in the Kapitza-Dirac effect
- Parameter space investigation for spin-dependent electron diffraction in the Kapitza-Dirac effect
- Strong coupling of virtual negative states in the Kapitza-Dirac effect
- Time evolution of charged particle wave functions in optical crystal: The coherent Kapitza-Dirac effect for plasma-based proton beams