We report on secondary surface relief grating formation associated with holographic recording of volume phase gratings in epoxy-based, free-surface, volume holographic recording material, as well as in pure Epon SU-8 photoresist. Light-induced gratings are formed simultaneously by photo-triggered mass migration in the cause of component diffusion. Height profiles of surface relief gratings are compared with refractive index modulation profiles of corresponding volume phase gratings. Parasitic volume gratings and non-sinusoidal profiles are also investigated. Based on the correlation of volume and surface gratings, analysis of the height profiles allows conclusions to be drawn on the mechanisms of volume holographic grating formation.

我们报告了与基于环氧树脂的，自由表面的体积全息记录材料以及纯Epon SU-8光刻胶中的体积相光栅的全息记录相关的二次表面起伏光栅的形成。在组件扩散的原因中，通过光触发质量迁移同时形成了光感应光栅。将表面起伏光栅的高度轮廓与相应的体积相位光栅的折射率调制轮廓进行比较。还研究了寄生体积光栅和非正弦轮廓。基于体光栅与表面光栅的相关性，对高度轮廓的分析可以得出有关体全息光栅形成机理的结论。