@article{21530,
  abstract     = {Metasurfaces, ultrathin structures composed of subwavelength optical elements, have revolutionized light manipulation by enabling precise control over electromagnetic waves’ amplitude, phase, polarization, and spectral properties. Concurrently, computational imaging leverages algorithms to reconstruct images from optically processed signals, overcoming the limitations of traditional imaging systems. This Perspective explores the synergistic integration of metaoptics and computational imaging, “metaoptic computational imaging”, which combines the physical wavefront shaping ability of metasurfaces with advanced computational algorithms to enhance imaging performance beyond conventional limits. We discuss how metaoptic computational imaging addresses the inherent limitations of single-layer metasurfaces in achieving multifunctionality without compromising efficiency. By treating metasurfaces as physical preconditioners and codesigning them with reconstruction algorithms through end-to-end (inverse) design, it is possible to jointly optimize the optical hardware and computational software. Advanced applications and new frontiers in the field enabled by metaoptic computational imaging are highlighted, including phase imaging and quantum state measurement.},
  author       = {Roques-Carmes, Charles and Wang, Kai and Yang, Yuanmu and Majumdar, Arka and Lin, Zin},
  issn         = {2330-4022},
  journal      = {ACS Photonics},
  keywords     = {nanophotonics, metasurfaces, computational imaging, inverse design},
  number       = {4},
  pages        = {1722--1733},
  publisher    = {American Chemical Society},
  title        = {{Metaoptic computational imaging}},
  doi          = {10.1021/acsphotonics.4c02266},
  volume       = {12},
  year         = {2025},
}

@article{21527,
  abstract     = {Optical metasurfaces have been heralded as the platform to integrate multiple functionalities in a compact form-factor, with the potential to replace bulky optical components. A central stepping stone toward realizing this promise is the demonstration of multifunctionality under several constraints (e.g., at multiple incident wavelengths and/or angles) in a single device, an achievement being hampered by design limitations inherent to single-layer planar geometries. Here, we propose a framework for the inverse design of multilayer metaoptics via topology optimization, showing that even few-wavelength thick devices can achieve high-efficiency multifunctionality, such as multiangle light concentration and plan-achromaticity. We embody our framework in multiple closely spaced patterned layers of a low-index polymer, with fabrication constraints specific to this platform enforced in the optimization process. We experimentally demonstrate our approach with an inverse-designed 3D-printed light concentrator working at five different nonparaxial angles of incidence. Our framework paves the way toward realizing multifunctional ultracompact 3D nanophotonic devices.},
  author       = {Roques-Carmes, Charles and Lin, Zin and Christiansen, Rasmus E. and Salamin, Yannick and Kooi, Steven E. and Joannopoulos, John D. and Johnson, Steven G. and Soljačić, Marin},
  issn         = {2330-4022},
  journal      = {ACS Photonics},
  keywords     = {metasurfaces, inverse design, multilayered metaoptics, 3D printing, topology optimization},
  number       = {1},
  pages        = {43--51},
  publisher    = {American Chemical Society},
  title        = {{Toward 3D-printed inverse-designed metaoptics}},
  doi          = {10.1021/acsphotonics.1c01442},
  volume       = {9},
  year         = {2022},
}