Kim Inki, Ansari Muhammad Afnan, Mehmood Muhammad Qasim, Kim Won-Sik, Jang Jaehyuck, Zubair Muhammad, Kim Young-Ki, Rho Junsuk
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
Department of Electrical Engineering, Information Technology University of the Punjab, Lahore, 54600, Pakistan.
Adv Mater. 2020 Dec;32(50):e2004664. doi: 10.1002/adma.202004664. Epub 2020 Nov 10.
Flat optics, realized by the artificially created 2D material platform called optical metasurfaces, is currently undergoing a science-to-technology transition. However, "real-time" active operations of such flat optical devices remain yet unresolved. Here, liquid crystals (LCs)-integrated metaholograms for ultracompact dynamic holographic displays are proposed. The anisotropic nature of the LCs allows facile and repeatable manipulation of the polarization of light. Specifically designed ("designer") LCs and efficient helicity-encoded metaholograms are combined to realize stimuli-responsive dynamic displays. The designer LC modulators are used as switches that enable a variety of external stimuli (e.g., electric field, heat, surface pressure) to operate holographic images in real-time. Such a dynamic metaholographic platform will provide a path to external stimuli-driven "smart" sensing and display applications such as hologram labels for temperature/pressure/touch monitoring and interactive holographic displays with haptic motion recognition.
由称为光学超表面的人工创建的二维材料平台实现的平面光学，目前正在经历从科学到技术的转变。然而，此类平面光学器件的“实时”主动操作仍未得到解决。在此，提出了用于超紧凑型动态全息显示的集成液晶（LC）的超全息图。液晶的各向异性性质使得能够轻松且可重复地操纵光的偏振。将经过特殊设计的（“定制”）液晶与高效的螺旋度编码超全息图相结合，以实现对刺激做出响应的动态显示。定制的液晶调制器用作开关，使各种外部刺激（例如电场、热、表面压力）能够实时操作全息图像。这样一个动态超全息平台将为外部刺激驱动的“智能”传感和显示应用提供一条途径，例如用于温度/压力/触摸监测的全息标签以及具有触觉运动识别功能的交互式全息显示。
