Large-area, high-numerical-aperture multi-level diffractive lens via inverse design: comment

Philippe Lalanne (1) , Pierre Chavel

1 LP2N - Laboratoire Photonique, Numérique et Nanosciences

The memorandum [Optica 7, 252 (2020).; Optica 7, 1323 (2020).] is devoted to the design, fabrication, and characterization of an optimized multi-level diffractive lens, emphasizing the advantages of the multi-level approach compared to the metalens approach. While such advantages may well exist, we feel that a number of statements in the memorandum require clarification. We add some references on multi-level diffractive lens optimization that place the memorandum's contributions in a more complete context.

Domaines: Optique / photonique

Philippe Lalanne, Pierre Chavel. Large-area, high-numerical-aperture multi-level diffractive lens via inverse design: comment. Optica, 2021, 8 (7), pp.1009. ⟨10.1364/OPTICA.416017⟩. ⟨hal-03358021⟩