Graphene: Surface Acoustic Wave Driven Light Shutters Using Polymer‐Dispersed Liquid Crystals (Adv. Mater. 14/2011)

The cover shows a surface acoustic-wave driven light shutter formed from a polymer-dispersed liquid crystal (PDLC) film. In regions without surface acoustic waves (SAWs) the LC molecules in the droplets show a radial alignment, while within the SAW working region, the LC molecules show an alignment perpendicular to the substrate. With further optimization, this PDLC-based light shutter, reported on p. 1656 by Tony Jun Huang and co-workers, could possess advantages such as low power consumption, high throughput, and excellent optical properties.