Holographic grating fabrication for wide angular band-width using polymer thin films

• 作者: WU Peng-fei WU Zi-jun ZHUANG Yu LIU Hong-liang
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: Devices
• 页码范围: 1-4
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-021-9220-8

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 re-sults confirm that the liquid crystal materials increase the refractive index modulation of the grating,enabling high dif-fraction 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.