On-Chip Laser-Driven Free-Electron Spin Polarizer

• URL: http://arxiv.org/abs/2507.17993v1
• Date: Wed, 23 Jul 2025 23:56:28 GMT
• Title: On-Chip Laser-Driven Free-Electron Spin Polarizer
• Authors: Clarisse Woodahl, Melanie Murillo, Charles Roques-Carmes, Aviv Karnieli, David A. B. Miller, Olav Solgaard,
• Abstract summary: Spin-polarized electron beam sources enable studies of spin-dependent electric and magnetic effects at the nanoscale.<n>We propose a method of creating spin-polarized electrons on an integrated photonics chip by laser driven nanophotonic fields.
• Score: 0.21697444224751963
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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