一种几何相位光学元件的制备方法
By processing nanopore structures in sections on the substrate and adjusting the scanning direction of the laser beam, the problems of low transmittance and strong polarization dependence of existing geometric phase optical elements have been solved, and geometric phase optical elements with high transmittance and low polarization dependence have been fabricated.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2024-03-01
- Publication Date
- 2026-07-17
AI Technical Summary
Existing geometric phase optical elements have low transmittance and are polarization-dependent, making it difficult to meet the requirements for efficient optical field phase and polarization state control.
A femtosecond laser processing system is used to process nanopore structures at a preset depth in the substrate by partitioning the substrate. The scanning direction of the laser beam is adjusted so that the fast axis direction of the nanopore structure is less than the preset angle with the scanning direction, thus forming a hierarchical geometric phase optical element.
It significantly improves the transmittance of geometric phase optical elements, reduces the polarization dependence of transmittance, and achieves efficient control of optical field phase and polarization state.
Smart Images
Figure CN118023736B_ABST