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Lens size and shape for (a) GRIN , (b) NIM , and (c) positive index material (PIM) lenses of focal length. Note that a GRIN lens is smaller than comparable NIM and PIM lenses.
(a) Index of refraction and discretization (dashed line) used for GRIN lens. (b) Ray tracing using Eikonal equation having smooth index profile shown in (a).
Unit cell design geometry for GRIN lens.
(Color) Approximate plain wave illuminated normalized experimental contours with and without GRIN lens at 17.2 and .
(Color) Approximate plane wave illuminated normalized experimental (left) and simulated (right) surface and line plots (bottom) for GRIN lens at . For the line plots the simulated values are shown in red and the measured values in blue.
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