Inverse design of broadband and reconfigurable meta-optics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 meta-atoms can be constructed from phase change materials which give the added flexibility of realizing reconfigurable meta-optics. 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-of-the-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, multi-objective 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.

Original languageEnglish (US)
Title of host publicationMetamaterials XIII
EditorsVladimir Kuzmiak, Peter Markos, Tomasz Szoplik
PublisherSPIE
ISBN (Electronic)9781510643727
DOIs
StatePublished - 2021
EventMetamaterials XIII 2021 - Virtual, Online, Czech Republic
Duration: Apr 19 2021Apr 23 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11769
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMetamaterials XIII 2021
Country/TerritoryCzech Republic
CityVirtual, Online
Period4/19/214/23/21

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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