On-chip laser-driven free-electron spin polarizer

article On-chip laser-driven free-electron spin polarizer published yes Clarisse Woodahl author Melanie Murillo author Charles Roques-Carmes author e2e68fc9-6505-11ef-a541-eb4e72cc3e82 Aviv Karnieli author David A. B. Miller author Olav Solgaard author 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 wave function. The second stage uses an adjusted optical near field to rotate the spin states utilizing the spin-dependent wave-packet 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 tabletop lasers. American Physical Society2026 eng Physical Review Letters 0031-9007 1079-711410.1103/3c1m-d3hh 1366 yes Woodahl, Clarisse, Melanie Murillo, Charles Roques-Carmes, Aviv Karnieli, David A. B. Miller, and Olav Solgaard. “On-Chip Laser-Driven Free-Electron Spin Polarizer.” Physical Review Letters. American Physical Society, 2026. <a href="https://doi.org/10.1103/3c1m-d3hh">https://doi.org/10.1103/3c1m-d3hh</a>. Woodahl C, Murillo M, Roques-Carmes C, Karnieli A, Miller DAB, Solgaard O. 2026. On-chip laser-driven free-electron spin polarizer. Physical Review Letters. 136(6), 063802. Woodahl C, Murillo M, Roques-Carmes C, Karnieli A, Miller DAB, Solgaard O. On-chip laser-driven free-electron spin polarizer. Physical Review Letters. 2026;136(6). doi:<a href="https://doi.org/10.1103/3c1m-d3hh">10.1103/3c1m-d3hh</a> Woodahl, C., Murillo, M., Roques-Carmes, C., Karnieli, A., Miller, D. A. B., & Solgaard, O. (2026). On-chip laser-driven free-electron spin polarizer. Physical Review Letters. American Physical Society. <a href="https://doi.org/10.1103/3c1m-d3hh">https://doi.org/10.1103/3c1m-d3hh</a> C. Woodahl, M. Murillo, C. Roques-Carmes, A. Karnieli, D. A. B. Miller, and O. Solgaard, “On-chip laser-driven free-electron spin polarizer,” Physical Review Letters, vol. 136, no. 6. American Physical Society, 2026. C. Woodahl, M. Murillo, C. Roques-Carmes, A. Karnieli, D.A.B. Miller, O. Solgaard, Physical Review Letters 136 (2026). Woodahl, Clarisse, et al. “On-Chip Laser-Driven Free-Electron Spin Polarizer.” Physical Review Letters, vol. 136, no. 6, 063802, American Physical Society, 2026, doi:<a href="https://doi.org/10.1103/3c1m-d3hh">10.1103/3c1m-d3hh</a>. 215552026-03-30T12:22:47Z2026-04-27T08:34:51Z