Abstract
Unpolarized light is ubiquitous in nature. It does not carry spin angular momentum but it can be converted to partially polarized light with spin angular momentum after scattering. In this work, we demonstrate that the unpolarized light not only possesses a definite spin state after scattering but also induces lateral separation of scattered light with opposite chiralities. Such spin-locked scattering of unpolarized light stems from the inherent property of magnetoelectric coupling of the scatterer. Moreover, the spin-locked scattering for arbitrary linearly polarized light is also investigated and compared with the case of unpolarized light. Our findings can broaden the application range of unpolarized light and open other avenues for spin-related phenomena induced by unpolarized light.
Published Version
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