Fullwave Maxwell inverse design of axisymmetric, tunable, and multi-scale multi-wavelength metalenses
Abstract
We demonstrate new axisymmetric inverse-design techniques that can solve problems radically different from traditional lenses, including reconfigurable lenses (that shift a multi-frequency focal spot in response to refractive-index changes) and widely separated multi-wavelength lenses (λ = 1 µm and 10 µm). We also present experimental validation for an axisymmetric inverse-designed monochrome lens in the near-infrared fabricated via two-photon polymerization. Axisymmetry allows fullwave Maxwell solvers to be scaled up to structures hundreds or even thousands of wavelengths in diameter before requiring domain-decomposition approximations, while multilayer topology optimization with ∼105 degrees of freedom can tackle challenging design problems even when restricted to axisymmetric structures.
- Publication:
-
Optics Express
- Pub Date:
- November 2020
- DOI:
- 10.1364/OE.403192
- arXiv:
- arXiv:2007.11661
- Bibcode:
- 2020OExpr..2833854C
- Keywords:
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- Physics - Optics;
- Physics - Applied Physics
- E-Print:
- 13 pages, 6 figures