This article is cited in 1 paper

Surfaces, Electron and Ion Emission

Influence of the alignment surface on the characteristics of optically addressed liquid-crystal modulators

L. P. Amosova, A. N. Chaika

St. Petersburg National Research University of Information Technologies, Mechanics and Optics

Abstract: Two optically addressed transmission-type liquid-crystal modulators based on a nematic liquid crystal-$a$-Si: C: H photoconductor structure are studied. The modulators differ in the initial tilt angle of the director and in the barrier height at the interface. It is shown that these parameters influence the dependence of the diffraction efficiency on the feed conditions, recording pulse repetition rate, and spatial frequency of the recorded grating. The spatial resolution of the modulators at a level of half the diffraction efficiency is equal to 75 mm$^{-1}$. The maximal diffraction efficiency is high, 69%, owing to the asymmetric profile of the grating, which arises at a large initial tilt angle of the liquid crystal director.

Received: 18.02.2010

 English version: Technical Physics, 2010, 55:10, 1517–1523

Bibliographic databases:

•