---
res:
  bibo_abstract:
  - We present full-Maxwell topology-optimization design of a single-piece multilayer
    metalens, about 10 wavelengths λ in thickness, which simultaneously focuses over
    a 60° angular range and a 23% spectral bandwidth without suffering chromatic or
    angular aberration, a “plan-achromat.” At all angles and frequencies, it achieves
    diffraction-limited focusing (Strehl ratio >0.8) and an absolute focusing
    efficiency of >50%. Both 2D and 3D axisymmetric designs are presented,
    optimized over ∼105 degrees of freedom. We also demonstrate shortening the lens-to-sensor
    distance while producing the same image as for a longer “virtual” focal length
    and maintaining plan-achromaticity. These proof-of-concept designs demonstrate
    the ultra-compact multifunctionality that can be achieved by exploiting the full
    wave physics of subwavelength designs and motivate future work on design and fabrication
    of multilayer metaoptics.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Zin
      foaf_name: Lin, Zin
      foaf_surname: Lin
  - foaf_Person:
      foaf_givenName: Charles
      foaf_name: Roques-Carmes, Charles
      foaf_surname: Roques-Carmes
      foaf_workInfoHomepage: http://www.librecat.org/personId=e2e68fc9-6505-11ef-a541-eb4e72cc3e82
  - foaf_Person:
      foaf_givenName: Rasmus E.
      foaf_name: Christiansen, Rasmus E.
      foaf_surname: Christiansen
  - foaf_Person:
      foaf_givenName: Marin
      foaf_name: Soljačić, Marin
      foaf_surname: Soljačić
  - foaf_Person:
      foaf_givenName: Steven G.
      foaf_name: Johnson, Steven G.
      foaf_surname: Johnson
  bibo_doi: 10.1063/5.0035419
  bibo_issue: '4'
  bibo_volume: 118
  dct_date: 2021^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0003-6951
  - http://id.crossref.org/issn/1077-3118
  dct_language: eng
  dct_publisher: AIP Publishing@
  dct_title: Computational inverse design for ultra-compact single-piece metalenses
    free of chromatic and angular aberration@
...