Fullwave Maxwell inverse design of axisymmetric, tunable, and multi-scale multi-wavelength metalenses

Rasmus E. Christiansen*, Zin Lin, Charles Roques Carmes, Yannick Salamin, Steven E. Kooi, John D. Joannopoulos, Marin Soljačić, Steven G. Johnson

*Corresponding author for this work

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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 10μm). 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.
Original languageEnglish
JournalOptics Express
Issue number23
Pages (from-to)33854-33868
Publication statusPublished - 2020

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© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement


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