Broadband graded index Gutman lens with a wide field of view utilizing artificial dielectrics: a design methodology

Petros Bantavis (1, 2) , Cebriàn Garcia-Gonzalez (1) , Ronan Sauleau (2) , George Goussetis (3) , Ségolène Tubau (4) , Hervé Legay (4)

1 Idonial, Res and Dev, Spain
2 IETR - Institut d'Électronique et des Technologies du numéRique
3 HWU - Heriot-Watt University [Edinburgh]
4 TAS - Thales Alenia Space [Toulouse]

A novel all-metal graded index Gutman lens is proposed. It exploits an interleaved metasurface unit-cell with glide symmetry that can provide high values of equivalent refractive index with low frequency dispersion. The result is a compact lens with broadband performance and a wide held of view up to +/- 70 degrees. The proposed lens exhibits low loss, directive beams and is an appealing candidate for space applications. The design approach introduced can be applied to other graded index lenses with circular symmetry using rectangular or circular periodic structures. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Domaines: Sciences de l'ingénieur [physics]

Petros Bantavis, Cebriàn Garcia-Gonzalez, Ronan Sauleau, George Goussetis, Ségolène Tubau, et al.. Broadband graded index Gutman lens with a wide field of view utilizing artificial dielectrics: a design methodology. Optics Express, 2020, 28 (10), pp.14648-14661. ⟨10.1364/OE.389887⟩. ⟨hal-02880697⟩