title: Transverse angular momentum and transverse barycenter shift of a focused light field due to nonuniform input angular momentum.
abstract: We calculate the spin, intrinsic and extrinsic orbital angular momenta, as well as the barycenter of the focal field after a high-NA lens and find that, when the input beam is with nonuniform angular momentum (AM), the focal field carries both longitudinal and transverse parts of AM and the barycenter of the field has a transverse shift owing to the spin and orbital Hall effect of light. When one half of the input beam possesses spin and orbital AM, σ and l, and the other half with -σ and -l, a pure transverse AM is generated in the focal field, accompanying a shift of the field barycenter in the transverse plane that depends on σ and l.
authors.forename: Wenguo
authors.initials: W
authors.lastname: Zhu
authors.forename: Weilong
authors.initials: W
authors.lastname: She