中国发明专利：光致形变液晶高分子三维可调谐光子晶体及其制备方法

发明（设计）人：赵新，纪新明，吴伟，程伏涛，俞燕蕾，黄宜平

申请人：复旦大学

专利号：ZL 201010197993.8

摘要：

本发明属于液晶高分子材料技术领域,具体为一种光致形变液晶高分子可调谐光子晶体及其制备方法。本发明先设计出可见光内的三维光子晶体图形结构,制作出SiO2模板,再采用纳米压印等技术将SiO2上的光子晶体结构转移到液晶上。将本发明制得的液晶光子晶体置于玻璃基底上,通过控制外加调制光的强度、入射角度、曝光时间、外界温度的变化使得液晶由向列相转化为同性相,从而改变光子晶体的三维结构参数,使光子禁带的位置发生偏移。该光子晶体可用以设计偏振片、全光光开关、全光可调光衰减器等,以提高微流控、生物监测传感器的检测精度。

Abstract：

The invention belongs to the technical field of the liquid crystal polymer material, particularly discloses a photo-deformable liquid crystal polymer three-dimensional tunable photonic crystal and a preparation method thereof. In the invention, the three-dimensional tunable photonic crystal graph structure in the visible light is designed; a SiO2 template is manufactured and then the photonic crystal structure on the SiO2 is transferred onto the liquid crystal by the nano impressing technology. The liquid crystal photonic crystal prepared by the invention is arranged on a glass substrate; the light intensity, the incident angle, the exposure time and the change of the external temperature are controlled and modulated, so that the liquid crystal is transformed from the nematic phase to the magnafacies, the three-dimensional structure parameter of the photonic crystal is changed and the position of the photonic band gap is biased. The photonic crystal can be used to design polarizing films, all-optical switches and all-optical variable optical attenuators and the like, so that the detection precision of the microfluidic and biological monitoring sensor is improved.