Liu Yan Jun, Lu Mengqian, Ding Xiaoyun, Leong Eunice S P, Lin Sz-Chin Steven, Shi Jinjie, Teng Jing Hua, Wang Lin, Bunning Timothy J, Huang Tony Jun
Department of Engineering Science and Mechanics, The Pennsylvania State University, PA, USA.
J Lab Autom. 2013 Aug;18(4):291-5. doi: 10.1177/2211068212455632. Epub 2012 Aug 21.
We report holographic polymer-dispersed liquid crystal (H-PDLC) gratings driven by surface acoustic waves (SAWs). Our experiments show that upon applying SAWs, the H-PDLC grating exhibited switchable properties: The diffraction of the H-PDLC grating decreased, whereas the transmission increased. This acoustically switchable behavior is due to the acoustic streaming-induced realignment of liquid crystals as well as absorption-resulted thermal diffusion. Such SAW-driven H-PDLC gratings are potentially useful in many photonic applications, such as optical switches, spatial light modulators, and switchable add/drop filters.
我们报道了由表面声波（SAW）驱动的全息聚合物分散液晶（H-PDLC）光栅。我们的实验表明，施加表面声波时，H-PDLC光栅表现出可切换特性：H-PDLC光栅的衍射减小，而透射率增加。这种声学可切换行为是由于声流引起的液晶重新排列以及吸收导致的热扩散。这种SAW驱动的H-PDLC光栅在许多光子应用中具有潜在用途，例如光开关、空间光调制器和可切换的分插复用滤波器。
