Moire-like patterns as a spatial beat frequency in photorefractive sinusoidal phase gratings superposition

摘要

Dynamic Moire-like patterns generation by the superposition of two dynamic sinusoidal phase gratings is described. Two sinusoidal phase gratings of slightly different pitches are involved and occur in the photorefractive crystal Bi12TiO20 (BTO). This holographic dynamic medium has been used in anisotropic two wave mixing architecture in diffusion only recording mechanism. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 19]