title: Observation of the in-plane spin separation of light.
abstract: We report on the observation of the spin separation of light in the plane of incidence when a linearly polarized beam is reflected or refracted at a planar dielectric interface. Remarkably, the in-plane spin separation reaches hundreds of nanometers, comparable with the transverse spin separation induced by the well-known spin Hall effect of light. The observation is properly explained by considering the in-plane spread of wave-vectors. This study thus offers new insights on the spinoptics and may provide a potential method to control light in optical nanodevices.
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Qin
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Feng
authors.forename: Yun-Feng
authors.initials: YF
authors.lastname: Xiao
authors.forename: Hong
authors.initials: H
authors.lastname: Yang
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong