Polarizing Free Electrons with Optical Method in Lab
Researchers at East China Normal University and Henan Academy of Sciences have introduced a new method to polarize free electrons in a laboratory setting using near-field optical techniques. The method could open interesting new possibilities for high-energy physics, quantum technology development, and materials science. The researchers used a nanowire array with a carefully designed lattice constant to ensure a near-field match between the input electron velocity and the structure, ensuring a strong interaction between them. The approach could be adapted and used by other research teams to create spin-polarized electron beams, while potentially also inspiring the development of new quantum computing approaches that leverage both the spins of electrons and photons.