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A Luneburg lens is a spherically symmetry gradient‐index lens that focuses a plane wave at a single point on the opposite side of the lens.
Luneburg lenses are applied in microwave technology [8, 9, 10] but have remained impossible to implement in optics. Here we demonstrate an integrated Luneburg lens on a silicon chip that works for near-infrared light.
m through Luneburg waveguide. In order to setup our arrangements we use silica glass for the Luneburg lenses with refractive index variation as in Eq.(1). In addition we use air for the outer medium with index of refraction n = 1 [11, 12, 14, 6] with a monochrom
Overview The Luneburg lens reflector is meticulously designed based on the principles of electromagnetic wave refraction and reflection. It uses microwave low-loss dielectric materials and precisely controls the distribution of the refractive index within the sphere.
Luneburg lenses are applied in microwave technol-ogy [8–11] and have recently been made for surface plasmons [12] but have remained impossi-ble to implement in integrated photonics. Here we demonstrate an integrated Luneburg lens on a silicon chip that works for near-infrared light.
Comparisons between (a) conventional Luneburg Lens and (b) Reflecting Luneburg Lens (RLL). In the RLL, the rays emerging from an arbitrary point at the periphery make longer paths and, after reflecting at the boundary, they are coupled to an upper …
Polaritonic Luneburg and Eaton lenses have been successfully fabricated using grey-scale electron beam litho-graphy (EBL) to pattern photoresist layers, such as polymethyl methacrylate(PMMA ...
Luneburg lens antennas are characterized by the possibility of multi beam scanning in a wide range of angles and high directivity. The focus of this paper is on the cylindrical Luneburg lens allowing the scanning only in one plane but much simpler than the spherical lens system.
Modeling of antenna configurations in-corporating Luneburg lenses provides some challenge for computational methods, as their inhomogeneous nature en-forces either applying differential-equation/grid methods or using volume sources within integral-equation/method-of-moments (MoM) solutions.
Luneburg Lens based multi-beam antenna platform supports infinite combinations of frequency bands and number of beams thus empowering network operators to match a solution to their particular situation.
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