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High-NA achromatic metalenses by inverse design

Optics express, 2020-03, Vol.28 (5), p.6945-6965 [Peer Reviewed Journal]

ISSN: 1094-4087 ;EISSN: 1094-4087 ;DOI: 10.1364/OE.385440 ;PMID: 32225932

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  • Title:
    High-NA achromatic metalenses by inverse design
  • Author: Chung, Haejun ; Miller, Owen D
  • Is Part Of: Optics express, 2020-03, Vol.28 (5), p.6945-6965
  • Description: We use inverse design to discover metalens structures that exhibit broadband, achromatic focusing across low, moderate, and high numerical apertures. We show that standard unit-cell approaches cannot achieve high-efficiency high-NA focusing, even at a single frequency, due to the incompleteness of the unit-cell basis, and we provide computational upper bounds on their maximum efficiencies. At low NA, our devices exhibit the highest theoretical efficiencies to date. At high NA-of 0.9 with translation-invariant films and of 0.99 with "freeform" structures-our designs are the first to exhibit achromatic high-NA focusing.
  • Publisher: United States
  • Language: English
  • Identifier: ISSN: 1094-4087
    EISSN: 1094-4087
    DOI: 10.1364/OE.385440
    PMID: 32225932
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    Alma/SFX Local Collection
    ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals

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