Simultaneous formation of holographic surface relief gratings and volume phase gratings in photosensitive polymer
Tina Sabel, Gonzalo de Vicente Lucas, Marga C. Lensen
Materials Research Letters · 2019
doi:10.1080/21663831.2019.1621956 (opens in a new tab)
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Abstract
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.
Abstract licence: CC BY-NC
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