Simulation and testing of a graded negative index of refraction lens (original) (raw)

ADS

;

• Parazzoli, C. G. ;
• Nielsen, J. A. ;
• Thompson, M. A. ;
• Tanielian, M. H. ;
• Smith, D. R.

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.

Publication:

Applied Physics Letters

Pub Date:

August 2005

DOI:

10.1063/1.2037202

Bibcode:

2005ApPhL..87i1114G

Keywords:

• 42.79.Bh;
• 42.79.Ry;
• 42.87.-d;
• 42.15.Eq;
• 42.15.Dp;
• 42.86.+b;
• Lenses prisms and mirrors;
• Gradient-index devices;
• Optical testing techniques;
• Optical system design;
• Wave fronts and ray tracing;
• Optical workshop techniques