Lee Yun-Han, Yin Kun, Wu Shin-Tson
Opt Express. 2017 Oct 30;25(22):27008-27014. doi: 10.1364/OE.25.027008.
We demonstrate a reflective liquid-crystal polarization volume grating with high efficiency for augmented reality displays. The coupling efficiency was measured to be 90% at 650 nm and 50° deflection angle. The angular dependence of reflection band agrees well with Bragg condition, and the transmittance of environment light is high with negligible scattering. The bandwidth can be tailored by controlling the layer periodicity, allowing versatile applications and design freedom not only for augmented realities but also for other photonic devices.
我们展示了一种用于增强现实显示器的高效反射型液晶偏振体光栅。在650纳米波长和50°偏转角下测得的耦合效率为90%。反射带的角度依赖性与布拉格条件吻合良好，环境光的透过率很高，散射可忽略不计。通过控制层周期性可以调整带宽，这不仅为增强现实，也为其他光子器件带来了广泛的应用和设计自由度。
