On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

In this work, we test the effectiveness of using highly transparent holographic phase reflection and transmission volume gratings based on multifunctional acrylates as linear compression and rotation sensors. The gratings are recorded in a holographic mixture based on multi-reticulated acrylate and haloalkanes. To activate the photo-polymerization process, we used a mixture of 6-oxocamphore and rhodamine 6G. The mixture is a simplified version of the mixture used in previous works and shows some interesting features mainly in connection with the different roles played by the rhodamine 6G dye at different writing wavelengths lambda = 532 nm and lambda = 460 nm. Regarding reflection gratings, the maximum achieved diffraction efficiency is asymptotic to 50% and their use as linear compression sensors produces a shift in the reflection peak of 2 nm. Following the removal of compression, the grating slowly returns to the initial state. Regarding transmission gratings, the maximum achieved diffraction efficiency is asymptotic to 45% and they demonstrate very high sensitivity to even small rotations in a free-standing configuration.

Automated summary

In this study, we investigated the use of highly transparent holographic phase reflection and transmission volume gratings as linear compression and rotation sensors. The gratings were recorded in a holographic mixture based on multi-reticulated acrylate and haloalkanes. We used a simplified version of the mixture used in previous works and observed interesting features associated with the roles of rhodamine 6G dye at different writing wavelengths. The reflection gratings achieved a maximum diffraction efficiency of around 50% and showed a shift in the reflection peak when used as linear compression sensors. The transmission gratings achieved a maximum diffraction efficiency of around 45% and demonstrated high sensitivity to small rotations in a free-standing configuration.