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Inverse design of large-area metasurfaces

Optics express, 2018-12, Vol.26 (26), p.33732-33747 [Peer Reviewed Journal]

ISSN: 1094-4087 ;EISSN: 1094-4087 ;DOI: 10.1364/OE.26.033732 ;PMID: 30650806

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  • Title:
    Inverse design of large-area metasurfaces
  • Author: Pestourie, Raphaël ; Pérez-Arancibia, Carlos ; Lin, Zin ; Shin, Wonseok ; Capasso, Federico ; Johnson, Steven G
  • Is Part Of: Optics express, 2018-12, Vol.26 (26), p.33732-33747
  • Description: We present a computational framework for efficient optimization-based "inverse design" of large-area "metasurfaces" (subwavelength-patterned surfaces) for applications such as multi-wavelength/multi-angle optimizations, and demultiplexers. To optimize surfaces that can be thousands of wavelengths in diameter, with thousands (or millions) of parameters, the key is a fast approximate solver for the scattered field. We employ a "locally periodic" approximation in which the scattering problem is approximated by a composition of periodic scattering problems from each unit cell of the surface, and validate it against brute-force Maxwell solutions. This is an extension of ideas in previous metasurface designs, but with greatly increased flexibility, e.g. to automatically balance tradeoffs between multiple frequencies or to optimize a photonic device given only partial information about the desired field. Our approach even extends beyond the metasurface regime to non-subwavelength structures where additional diffracted orders must be included (but the period is not large enough to apply scalar diffraction theory).
  • Publisher: United States
  • Language: English
  • Identifier: ISSN: 1094-4087
    EISSN: 1094-4087
    DOI: 10.1364/OE.26.033732
    PMID: 30650806
  • Source: Directory of Open Access Journals (DOAJ)
    Geneva Foundation Free Medical Journals at publisher websites
    ROAD
    Alma/SFX Local Collection
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