Tunable diffraction gratings mechanism

Bai S, Zhao Y. 2002. Azobenzene elastomers for mechanically tunable diffraction gratings. Macromolecules 35 9657 9664. 

Zhao Y, Bai S, Dumont D, Galstian TV. 2002. Mechanically tunable diffraction gratings recorded on an azobenzene elastomer. Adv Mater 14 512 514. 

Bai, S. Zhao, Y. (2002). Azobenzene Elastomers for Mechanically Tunable Diffraction Gratings. Macromolecules, 2002, 35,9657-9664. 

Zhao, Y. Bai, S. Dumont, D. Galstian, T. (2002). Mechanically Tunable Diffraction Gratings Recorded on an Azobenzene Elastomer. Adv. Mater., 2002,14, 512-514. 

Switching of an H-PDLC has also been accomplished mechanically [29], By using a relatively elastic photopolymer, De Rosa and coworkers were able to switch off the gratings by applying a shear stress to the cell. LC alignment may play a role in the results, however, the authors attributed the effect to a tilting of the grating. In other words, the direction of diffraction should be reversibly tunable by this method. 

---