article published yes Charles Roques-Carmes author e2e68fc9-6505-11ef-a541-eb4e72cc3e82 Zin Lin author Rasmus E. Christiansen author Yannick Salamin author Steven E. Kooi author John D. Joannopoulos author Steven G. Johnson author Marin Soljačić author 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. American Chemical Society2022 eng metasurfacesinverse designmultilayered metaoptics3D printingtopology optimization 2330-4022 2105.1132610.1021/acsphotonics.1c01442 9143-51 yes C. Roques-Carmes, Z. Lin, R.E. Christiansen, Y. Salamin, S.E. Kooi, J.D. Joannopoulos, S.G. Johnson, M. Soljačić, ACS Photonics 9 (2022) 43–51. Roques-Carmes C, Lin Z, Christiansen RE, et al. Toward 3D-printed inverse-designed metaoptics. <i>ACS Photonics</i>. 2022;9(1):43-51. doi:<a href="https://doi.org/10.1021/acsphotonics.1c01442">10.1021/acsphotonics.1c01442</a> Roques-Carmes C, Lin Z, Christiansen RE, Salamin Y, Kooi SE, Joannopoulos JD, Johnson SG, Soljačić M. 2022. Toward 3D-printed inverse-designed metaoptics. ACS Photonics. 9(1), 43–51. C. Roques-Carmes <i>et al.</i>, “Toward 3D-printed inverse-designed metaoptics,” <i>ACS Photonics</i>, vol. 9, no. 1. American Chemical Society, pp. 43–51, 2022. Roques-Carmes, Charles, Zin Lin, Rasmus E. Christiansen, Yannick Salamin, Steven E. Kooi, John D. Joannopoulos, Steven G. Johnson, and Marin Soljačić. “Toward 3D-Printed Inverse-Designed Metaoptics.” <i>ACS Photonics</i>. American Chemical Society, 2022. <a href="https://doi.org/10.1021/acsphotonics.1c01442">https://doi.org/10.1021/acsphotonics.1c01442</a>. Roques-Carmes, C., Lin, Z., Christiansen, R. E., Salamin, Y., Kooi, S. E., Joannopoulos, J. D., … Soljačić, M. (2022). Toward 3D-printed inverse-designed metaoptics. <i>ACS Photonics</i>. American Chemical Society. <a href="https://doi.org/10.1021/acsphotonics.1c01442">https://doi.org/10.1021/acsphotonics.1c01442</a> Roques-Carmes, Charles, et al. “Toward 3D-Printed Inverse-Designed Metaoptics.” <i>ACS Photonics</i>, vol. 9, no. 1, American Chemical Society, 2022, pp. 43–51, doi:<a href="https://doi.org/10.1021/acsphotonics.1c01442">10.1021/acsphotonics.1c01442</a>. 215272026-03-30T12:22:47Z2026-04-27T09:14:46Z