Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration

article Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration published yes Zin Lin author Charles Roques-Carmes author e2e68fc9-6505-11ef-a541-eb4e72cc3e82 Rasmus E. Christiansen author Marin Soljačić author Steven G. Johnson author 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 &gt;0.8) and an absolute focusing efficiency of &gt;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. AIP Publishing2021 eng Applied Physics Letters 0003-6951 1077-3118 2011.1046710.1063/5.0035419 1184 yes Z. Lin, C. Roques-Carmes, R. E. Christiansen, M. Soljačić, and S. G. Johnson, “Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration,” Applied Physics Letters, vol. 118, no. 4. AIP Publishing, 2021. Z. Lin, C. Roques-Carmes, R.E. Christiansen, M. Soljačić, S.G. Johnson, Applied Physics Letters 118 (2021). Lin Z, Roques-Carmes C, Christiansen RE, Soljačić M, Johnson SG. Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration. Applied Physics Letters. 2021;118(4). doi:<a href="https://doi.org/10.1063/5.0035419">10.1063/5.0035419</a> Lin Z, Roques-Carmes C, Christiansen RE, Soljačić M, Johnson SG. 2021. Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration. Applied Physics Letters. 118(4), 041104. Lin, Zin, Charles Roques-Carmes, Rasmus E. Christiansen, Marin Soljačić, and Steven G. Johnson. “Computational Inverse Design for Ultra-Compact Single-Piece Metalenses Free of Chromatic and Angular Aberration.” Applied Physics Letters. AIP Publishing, 2021. <a href="https://doi.org/10.1063/5.0035419">https://doi.org/10.1063/5.0035419</a>. Lin, Z., Roques-Carmes, C., Christiansen, R. E., Soljačić, M., & Johnson, S. G. (2021). Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration. Applied Physics Letters. AIP Publishing. <a href="https://doi.org/10.1063/5.0035419">https://doi.org/10.1063/5.0035419</a> Lin, Zin, et al. “Computational Inverse Design for Ultra-Compact Single-Piece Metalenses Free of Chromatic and Angular Aberration.” Applied Physics Letters, vol. 118, no. 4, 041104, AIP Publishing, 2021, doi:<a href="https://doi.org/10.1063/5.0035419">10.1063/5.0035419</a>. 215522026-03-30T12:22:47Z2026-04-27T09:56:01Z