Polarization gratings can be recorded in bacteriorhodopsin films by an orthogonal pair of linearly or circularly polarized beams. If a linearly polarized auxiliary violet light is added during the grating formation, the grating becomes polarization-sensitive. A theoretical model based on the two-state photochromic theory is proposed to calculate the diffraction efficiency kinetics of these polarization gratings. In both cases, the additional linearly polarized auxiliary violet irradiation improves the steady-state diffraction efficiency and leads to a cosine modulation of the steady-state diffraction efficiency by the polarization orientation of the readout beam. Experiment results demonstrate the correctness of the theoretical model.
© 2013 Optical Society of America
Diffraction and Gratings
Original Manuscript: April 29, 2013
Manuscript Accepted: July 23, 2013
Published: August 29, 2013
Vol. 8, Iss. 10 Virtual Journal for Biomedical Optics
Xianghua Yu, Peng Gao, Baoli Yao, Ming Lei, and Romano Rupp, "Kinetics of polarization gratings assisted with polarized violet light in bacteriorhodopsin films," J. Opt. Soc. Am. A 30, 1885-1891 (2013)