基于准晶超颖表面的全息显示与衍射图案生成双功能方法
By introducing quasi-periodic arrangement and an improved GS algorithm into the metasurface, the dual functions of holographic display and diffraction pattern are realized, solving the problems of pixel size and field of view limitations of traditional metasurfaces and expanding its application range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING INST OF TECH
- Filing Date
- 2024-01-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing metasurfaces suffer from problems such as large pixel size, small field of view, and limited spatial bandwidth product in holographic display and diffraction pattern generation. Furthermore, they do not fully utilize the symmetry of the arrangement of atomic atoms, which limits the development of their reuse technology.
By employing quasi-periodic quasicrystalline metasurfaces, combined with an improved Gerchberg-Saxton iterative algorithm and the principles of geometric and propagation phases, holographic information is encoded into the local phase response of nanopillars. The dielectric quasicrystalline metasurfaces are then fabricated by electron beam etching, achieving the dual functions of holographic display and diffraction patterning.
Without affecting the holographic display function, it generates a unique far-field diffraction pattern, expands the functionality of the metasurface, and is suitable for holographic anti-counterfeiting, optical switches and multifunctional optical systems, providing a new dimension of reuse technology.
Smart Images
Figure CN117950291B_ABST