Inverse design of broadband and reconfigurable meta-optics

S. D. Campbell; D. H. Werner; P. L. Werner

doi:10.1117/12.2589333

18 April 2021 Inverse design of broadband and reconfigurable meta-optics

S. D. Campbell, D. H. Werner, P. L. Werner

Proceedings Volume 11769, Metamaterials XIII; 117690N (2021) https://doi.org/10.1117/12.2589333
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

By exploiting the generalized form of Snell’s law, metasurfaces afford optical engineers a tremendous increase in degrees of design freedom compared to conventional optical components. These “meta-optics” can achieve unprecedented levels of performance through engineered wavelength-, angular-, and polarization-dependent responses which can be tailored by arranging subwavelength unit cells, or meta-atoms, in an intelligent way. Moreover, these metaatoms can be constructed from phase change materials which give the added flexibility of realizing reconfigurable metaoptics. Devices such as achromatic flat lenses and non-mechanical zoom lenses are becoming a reality through the advent of metasurface-augmented optical systems. However, achieving high-performance meta-optics relies heavily on proper meta-atom design. This challenge is best overcome through the use of advanced inverse-design tools and state-ofthe- art optimization algorithms. To this end, a number of successful meta-device inverse-design approaches have been demonstrated in the literature including those based on topology optimization, deep learning, and global optimization. While each has its pros and cons, multi-objective optimization strategies have proven quite successful do their ability to optimize problems with multiple competing objectives: a common occurrence in optical design. Moreover, multiobjective algorithms produce a Pareto Set of optimal solutions that designers can analyze in order to directly study the tradeoffs between the various design goals. In our presentation, we will introduce an efficient multi-objective optimization enabled design framework for the generation of broadband and multifunctional meta-atoms. Additionally, several meta-optic design examples will be presented, and future research directions discussed.

Conference Presentation

Citation Download Citation

S. D. Campbell, D. H. Werner, and P. L. Werner "Inverse design of broadband and reconfigurable meta-optics", Proc. SPIE 11769, Metamaterials XIII, 117690N (18 April 2021); https://doi.org/10.1117/12.2589333

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