全息三维视频显示可以通过二维平面信息得到三维真实图像，在医疗成像、国防安全、展览展示等诸多领域具有重要的应用价值，其关键问题在于解决对光的快速高分辨空间调制。本项目提出了采用纳米晶VO2薄膜的Mott相变效应实现全息三维视频显示的新方法。我们首先在分析大面积均匀单层纳米晶VO2薄膜可控生长机理的基础上，研究其光致相变的物理机制以及外电场对光致相变的影响，建立在外电场作用下光致相变的物理模型；然后设计纳米局域表面等离子共振结构降低光致相变阈值，研究局域化的电场或者磁场共振增强对光致相变的影响机理；进而在研究纳米晶VO2薄膜对大面积任意光学图样响应基础上，实现可快速刷新的具有高分辨率的二维折射率调制来获得对光波的空间调制。最后结合计算全息理论，探索纳米晶VO2薄膜的空间相位调制在全息三维视频显示中的应用。该项目的开展将为应用VO2薄膜实现全息三维视频显示提供理论基础和实验指导。

Three-dimentional(3D) holographic video display can present real 3D images through two-dimentional(2D) plane information, which will be of important application value in the fields of medical imaging, defense security, exhibition, etc. Its key physical problem is to achieve rapid spatial modulation to optical wave with high resolution. This project provides a new method to realize 3D holographic video display by using the Mott transition effect of nanocrystalline vanadium dioxide film. On the basis of analysing the controllable growth mechanism of fabricating large-area uniform nanocrystalline VO2 films，we study on the physical mechanism of the photo-induced Mott phase transition (PT) and effecs of electric field and tempreture on the photo-induced PT, and build the physical model of photo-induced PT under the external electric field; Then we design and fabricate nanoscale metal surface plasmon resonant structures to decrease the optical power threshold needed for the photo-induced PT and analyse the mechanism of effects of localized electric or magnetic field resonance enhancement on the photo-induced PT. Based upon the study on the respone of nanocrystalline VO2 films to large-area arbitrary optical patterns, we are to obtain rapidly updatable 2D refractive index modulation with high spatial resolution to realize spatial modulation to optical wave. Finally, combined with the computer-generated hologram, we will explore its application in the 3D holographic video display. The launch of this project will provide theoretical bases and experimental instructions for the application of VO2 in 3D holographic video display.