title: Laser polarization and phase control of up-conversion fluorescence in rare-earth ions.
abstract: We theoretically and experimentally demonstrate the up-conversion fluorescence control via resonance-mediated two-photon absorption in rare-earth ions by varying both the laser polarization and phase. We show that both the laser polarization and phase can control the up-conversion fluorescence, and the up-conversion fluorescence intensity is decreased when the laser polarization changes from linear through elliptical to circular. We also show that the laser polarization will affect the control efficiency of the up-conversion fluorescence by varying the laser phase, and the circular polarization will reduce the control efficiency. Furthermore, we suggest that the control efficiency by varying the laser polarization and the effect of the laser polarization on the control efficiency by varying the laser phase can be artificially manipulated by controlling the laser spectral bandwidth. This optical control method opens a new opportunity to control the up-conversion fluorescence of rare-earth ions, which may have significant impact on the related applications of rare-earth ions.
authors.affiliation: State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China.
authors.forename: Yunhua
authors.initials: Y
authors.lastname: Yao
authors.affiliation: State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China.
authors.forename: Shian
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Institute of Science, Information Engineering University, Zhengzhou 450001, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China.
authors.forename: Jingxin
authors.initials: J
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China.
authors.forename: Tianqing
authors.initials: T
authors.lastname: Jia
authors.affiliation: State key Laboratory of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu
authors.affiliation: State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China.
authors.forename: Zhenrong
authors.initials: Z
authors.lastname: Sun