Abstract

A gradient index (GRIN) lens using a negative index of refraction material (NIM) has been designed and tested. The GRIN lens was fabricated using a NIM slab with a variable index of refraction perpendicular to the propagation direction. Ray tracing calculations based on the isotropic Eikonal equation determined the index of refraction gradient required for a given focal length. An electromagnetic code was then used to design the required ring and wire unit cells. Finally, the index of refraction was approximated using ten discrete steps in an effective medium simulation for the GRIN lens that agreed with the experimental measurements.

Keywords

Refractive indexOpticsLens (geology)IsotropyRefractionRay tracing (physics)SlabEikonal equationTotal external reflectionPerpendicularNegative refractionGradient-index opticsGeometrical opticsPhysicsX-ray opticsAnisotropyFocal lengthGeometryMathematics

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Publication Info

Year
2005
Type
article
Volume
87
Issue
9
Citations
132
Access
Closed

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R.B. Greegor, Claudio G. Parazzoli, J. A. Nielsen et al. (2005). Simulation and testing of a graded negative index of refraction lens. Applied Physics Letters , 87 (9) . https://doi.org/10.1063/1.2037202

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DOI
10.1063/1.2037202