On-Chip Laser-Driven Free-Electron Spin Polarizer

Abstract

Spin-polarized electron beam sources enable studies of spin-dependent electric and magnetic effects at the nanoscale. We propose a method of creating spin-polarized electrons on an integrated photonics chip by laser driven nanophotonic fields. A two-stage interaction separated by a free space drift length is proposed, where the first stage and drift length introduces spin-dependent characteristics into the probability distribution of the electron wavefunction. The second stage uses an adjusted optical near-field to rotate the spin states utilizing the spin-dependent wavepacket distribution to produce electrons with high ensemble average spin expectation values. This platform provides an integrated and compact method to generate spin-polarized electrons, implementable with millimeter scale chips and table-top lasers.

References in corpus (6)

• Laser-based acceleration of non-relativistic electrons at a dielectric structure
• Spin dynamics in the Kapitza-Dirac effect
• Single-Shot Multi-Stage Damage and Ablation of Silicon by Femtosecond Mid-infrared Laser Pulses
• Enhanced energy gain in a dielectric laser accelerator using a tilted pulse front laser
• Spin effects in Kapitza-Dirac scattering at light with elliptical polarization
• Parameter space investigation for spin-dependent electron diffraction in the Kapitza-Dirac effect