Luo Yang, Fang Li-Nan, Wei Wei-Hua, Guan Wei, Dai Yun-Zhi, Sun Xiang-Chao, Gao Bing-Rong
Appl Opt. 2022 Jan 20;61(3):792-796. doi: 10.1364/AO.444222.
Switchable and reversible optical elements have potential applications in self-adaptive optics. Shape-memory polymer devices with adaptive properties could be easily switched under environment or field stimuli. Here, the laser beam interference technique was used to realize the periodic grating structures of the shape-memory polymer, and memory and recovery of the grating structures were performed. A one-dimensional grating structure was fabricated from dual-beam interference lithography of a nanosecond laser and underwent pressure in a condition of 195°C. The vertical height of the grating was reduced, and the diffraction light was weakened. When the sample was cooled down to room temperature, the morphology of the grating could be kept. After raising the ambient temperature of the sample to 120°C, the morphology of the grating was recovered to the original state, which realized the shape-memory function.
可切换和可逆光学元件在自适应光学中具有潜在应用。具有自适应特性的形状记忆聚合物器件可在环境或场刺激下轻松切换。在此，利用激光束干涉技术实现了形状记忆聚合物的周期性光栅结构，并进行了光栅结构的记忆和恢复。通过纳秒激光的双光束干涉光刻制备了一维光栅结构，并在195°C的条件下施加压力。光栅的垂直高度降低，衍射光减弱。当样品冷却至室温时，光栅的形态可以保持。将样品的环境温度升至120°C后，光栅的形态恢复到原始状态，实现了形状记忆功能。
