Bibliographic Details
| Title: |
Scalable freeform optimization of wide-aperture 3D metalenses by zoned discrete axisymmetry |
| Authors: |
Sun, Mengdi, Shakeri, Ata, Keshvari, Arvin, Giannakopoulos, Dimitrios, Wang, Qing, Chen, Wei Ting, Johnson, Steven G., Lin, Zin |
| Publication Year: |
2025 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Optics, Physics - Computational Physics |
| More Details: |
We introduce a novel framework for design and optimization of 3D freeform metalenses that attains nearly linear scaling of computational cost with diameter, by breaking the lens into a sequence of radial "zones" with $n$-fold discrete axisymmetry, where $n$ increases with radius. This allows vastly more design freedom than imposing continuous axisymmetry, while avoiding the compromises of the locally periodic approximation (LPA) or scalar diffraction theory. Using a GPU-accelerated finite-difference time-domain (FDTD) solver in cylindrical coordinates, we perform full-wave simulation and topology optimization within each supra-wavelength zone. We validate our approach by designing millimeter and centimeter-scale, poly-achromatic, 3D freeform metalenses which outperform the state of the art. By demonstrating the scalability and resulting optical performance enabled by our "zoned discrete axisymmetry" (ZDA) and supra-wavelength domain decomposition, we highlight the potential of our framework to advance large-scale meta-optics and next-generation photonic technologies.
Comment: 15 pages, 8 figures |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/2501.07979 |
| Accession Number: |
edsarx.2501.07979 |
| Database: |
arXiv |
