title: Control of spin angular momentum in quasi-phase-matched material.
abstract: A method to control spin angular momentum (SAM), based on mutual effects of a electro-optic effect and a quasi-phase-matched (QPM) technique in QPM material, is proposed. By controlling the external electric field or operating wavelength, the transfer between left- and right-handed circularly polarized photons is achieved, thus the total SAM is manipulated. The external electric field needed in this method for the complete modulation of the total SAM per photon from 0 to ħ is as low as 0.44 kV/cm. This method will see its applications in micromanipulation by light.
authors.affiliation: Department of Physics, The State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
authors.forename: Linghao
authors.initials: L
authors.lastname: Tian
authors.forename: Kun
authors.initials: K
authors.lastname: Liu
authors.forename: Juan
authors.initials: J
authors.lastname: Huo
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen