title: Effect of reconstruction beam polarization on the kinetics of anisotropic gratings in bacteriorhodopsin.
abstract: Anisotropic gratings are recorded on bacteriorhodopsin films by two parallelly polarized beams, and the effect of the polarization orientation of the reconstructing beam on the diffraction efficiency kinetics is studied. A theoretical model for the diffraction efficiency kinetics of the anisotropic grating is developed by combining Jones-matrix and photochromic two-state theory. It is found that the polarization azimuth of the reconstructing beam produces a cosine modulation on the kinetics of the diffraction efficiency, being positive at the peak efficiency and negative for steady state. By adding auxiliary violet light during grating formation, the saturation of the grating can be restrained. As a result, the negative cosine modulation for the steady-state diffraction efficiency changes to a positive one. In addition, the steady-state diffraction efficiency is increased appreciably for all reconstructing polarization orientations.
authors.affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.forename: Baoli
authors.initials: B
authors.lastname: Yao
authors.forename: Junhe
authors.initials: J
authors.lastname: Han
authors.forename: Liju
authors.initials: L
authors.lastname: Chen
authors.forename: Yingli
authors.initials: Y
authors.lastname: Wang
authors.forename: Ming
authors.initials: M
authors.lastname: Lei
authors.forename: Romano A
authors.initials: RA
authors.lastname: Rupp
mesh_terms: D016880:Anisotropy; D001436:Bacteriorhodopsins / Q000737:chemistry* / Q000502:physiology; D007091:Image Processing, Computer-Assisted; D010777:Photochemistry
chemical_list: D001436:Bacteriorhodopsins