Open AccessPolarization direction modulation for spin-polarized electrons with liquid crystal variable retarder
Author(s) -
Ding Hai-Bing,
Pang Wen-Ning,
Yibao Liu,
Shang Ren-Cheng
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.4097
Subject(s) - polarization (electrochemistry) , pockels effect , electron , polarimeter , physics , optics , helicity , retarder , polarization rotator , liquid crystal , circular polarization , photon , materials science , polarimetry , birefringence , scattering , laser , quantum mechanics , chemistry , composite material , microstrip
The production of spin-polarized electrons and the modulation of polarization direction with liquid crystal variable retarder (LCVR) are discussed. The LCVR ca n play the roles of 1/4, 1/2, 3/4 and whole-wave plates with special voltages in the optical system. And the advantages of using LCVR instead of Pockels cell an d 1/4λ plate are the insensitivity to the incident photon direction, and the va riability of retardation over a large wavelength range without mechanical moveme nt. The polarization direction of spin-polarized electrons can be modulated easi ly by switching the helicity of the circularly polarized light. In order to dete rmine the photon polarization, the spinning polarimeter is developed. And the re sult is also described.