Holographic grating fabrication for wide angular bandwidth using polymer thin films  

作　　者：WU Peng-fei WU Zi-jun ZHUANG Yu LIU Hong-liang 武鹏飞;吴子军;庄宇;刘洪亮(Institute of Modern Optics,Nankai University,Tianjin 300071,China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China;Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China)

机构地区：[1]Institute of Modern Optics,Nankai University,Tianjin 300071,China [2]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China [3]Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China

出　　处：《Optoelectronics Letters》2021年第1期1-4,共4页光电子快报（英文版）

基　　金：This work has been supported by the National Natural Science Foundation of China(Nos.61575097,21473093 and 11704201);the Natural Science Foundation of Tianjin City(No.17JCQNJC01600).

摘　　要：To increase the angular bandwidth of volume holographic grating, we fabricate holographic gratings based on grating multiplexing technique by using thin films of photopolymers and polymer dispersed liquid crystals. Experimental results confirm that the liquid crystal materials increase the refractive index modulation of the grating, enabling high diffraction efficiency with wide angular response compared to pure polymer materials. We observe that the fabricated holographic grating has near 80% of diffraction efficiency and about 18° of angular bandwidth, which can be further improved by modifying the liquid crystal/polymer mixtures and the grating multiplexing technique. The grating can be used to fabricate holographic waveguide structures for emerging applications in the near-eye display systems.

关 键 词：technique. WAVEGUIDE HOLOGRAPHIC 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TB383.2[自动化与计算机技术—计算机科学与技术]